EP1773801A1 - Method for obtaining pure tetrahydrocannabinol - Google Patents
Method for obtaining pure tetrahydrocannabinolInfo
- Publication number
- EP1773801A1 EP1773801A1 EP04738098A EP04738098A EP1773801A1 EP 1773801 A1 EP1773801 A1 EP 1773801A1 EP 04738098 A EP04738098 A EP 04738098A EP 04738098 A EP04738098 A EP 04738098A EP 1773801 A1 EP1773801 A1 EP 1773801A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thc
- acid
- compounds
- tetrahydrocannabinol
- salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- CYQFCXCEBYINGO-IAGOWNOFSA-N delta1-THC Chemical compound C1=C(C)CC[C@H]2C(C)(C)OC3=CC(CCCCC)=CC(O)=C3[C@@H]21 CYQFCXCEBYINGO-IAGOWNOFSA-N 0.000 title claims abstract description 107
- 229960004242 dronabinol Drugs 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 title claims abstract description 28
- CYQFCXCEBYINGO-UHFFFAOYSA-N THC Natural products C1=C(C)CCC2C(C)(C)OC3=CC(CCCCC)=CC(O)=C3C21 CYQFCXCEBYINGO-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 239000002904 solvent Substances 0.000 claims abstract description 40
- 150000001875 compounds Chemical class 0.000 claims abstract description 25
- 239000011541 reaction mixture Substances 0.000 claims abstract description 20
- 239000003814 drug Substances 0.000 claims abstract description 6
- 238000002560 therapeutic procedure Methods 0.000 claims abstract description 3
- 150000003839 salts Chemical class 0.000 claims description 35
- -1 tetrahydrocannabinol compound Chemical class 0.000 claims description 31
- 239000002253 acid Substances 0.000 claims description 23
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 claims description 22
- 150000002148 esters Chemical class 0.000 claims description 20
- 230000015572 biosynthetic process Effects 0.000 claims description 18
- 238000002360 preparation method Methods 0.000 claims description 17
- 239000012043 crude product Substances 0.000 claims description 14
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 14
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 13
- 125000001424 substituent group Chemical group 0.000 claims description 13
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 12
- 239000002585 base Substances 0.000 claims description 12
- LNETULKMXZVUST-UHFFFAOYSA-N 1-naphthoic acid Chemical compound C1=CC=C2C(C(=O)O)=CC=CC2=C1 LNETULKMXZVUST-UHFFFAOYSA-N 0.000 claims description 9
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 9
- 125000001624 naphthyl group Chemical group 0.000 claims description 7
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 6
- 150000001768 cations Chemical class 0.000 claims description 6
- 150000004985 diamines Chemical class 0.000 claims description 6
- 235000006408 oxalic acid Nutrition 0.000 claims description 6
- 125000001931 aliphatic group Chemical group 0.000 claims description 5
- 125000000449 nitro group Chemical group [O-][N+](*)=O 0.000 claims description 5
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 230000000707 stereoselective effect Effects 0.000 claims description 5
- PVOAHINGSUIXLS-UHFFFAOYSA-N 1-Methylpiperazine Chemical compound CN1CCNCC1 PVOAHINGSUIXLS-UHFFFAOYSA-N 0.000 claims description 4
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 claims description 4
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-N Hydrogen bromide Chemical compound Br CPELXLSAUQHCOX-UHFFFAOYSA-N 0.000 claims description 4
- 229910002651 NO3 Inorganic materials 0.000 claims description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 4
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 claims description 4
- KYQCOXFCLRTKLS-UHFFFAOYSA-N Pyrazine Chemical compound C1=CN=CC=N1 KYQCOXFCLRTKLS-UHFFFAOYSA-N 0.000 claims description 4
- KAESVJOAVNADME-UHFFFAOYSA-N Pyrrole Chemical compound C=1C=CNC=1 KAESVJOAVNADME-UHFFFAOYSA-N 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 150000001991 dicarboxylic acids Chemical class 0.000 claims description 4
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 4
- 229910052736 halogen Inorganic materials 0.000 claims description 4
- 150000002367 halogens Chemical group 0.000 claims description 4
- 239000001257 hydrogen Substances 0.000 claims description 4
- 229910052739 hydrogen Inorganic materials 0.000 claims description 4
- 150000007519 polyprotic acids Polymers 0.000 claims description 4
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 4
- 125000000472 sulfonyl group Chemical group *S(*)(=O)=O 0.000 claims description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- XGWFJBFNAQHLEF-UHFFFAOYSA-N 9-anthroic acid Chemical compound C1=CC=C2C(C(=O)O)=C(C=CC=C3)C3=CC2=C1 XGWFJBFNAQHLEF-UHFFFAOYSA-N 0.000 claims description 3
- DCXYFEDJOCDNAF-UHFFFAOYSA-N Asparagine Chemical compound OC(=O)C(N)CC(N)=O DCXYFEDJOCDNAF-UHFFFAOYSA-N 0.000 claims description 3
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 claims description 3
- 150000007513 acids Chemical class 0.000 claims description 3
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 125000001309 chloro group Chemical group Cl* 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- LMFJKKGDLAICPF-UHFFFAOYSA-N phenanthrene-9-carboxylic acid Chemical compound C1=CC=C2C(C(=O)O)=CC3=CC=CC=C3C2=C1 LMFJKKGDLAICPF-UHFFFAOYSA-N 0.000 claims description 3
- BJEPYKJPYRNKOW-REOHCLBHSA-N (S)-malic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O BJEPYKJPYRNKOW-REOHCLBHSA-N 0.000 claims description 2
- PRPINYUDVPFIRX-UHFFFAOYSA-N 1-naphthaleneacetic acid Chemical compound C1=CC=C2C(CC(=O)O)=CC=CC2=C1 PRPINYUDVPFIRX-UHFFFAOYSA-N 0.000 claims description 2
- 239000005971 1-naphthylacetic acid Substances 0.000 claims description 2
- LBLYYCQCTBFVLH-UHFFFAOYSA-N 2-Methylbenzenesulfonic acid Chemical compound CC1=CC=CC=C1S(O)(=O)=O LBLYYCQCTBFVLH-UHFFFAOYSA-N 0.000 claims description 2
- BSKHPKMHTQYZBB-UHFFFAOYSA-N 2-methylpyridine Chemical compound CC1=CC=CC=N1 BSKHPKMHTQYZBB-UHFFFAOYSA-N 0.000 claims description 2
- UOBYKYZJUGYBDK-UHFFFAOYSA-N 2-naphthoic acid Chemical compound C1=CC=CC2=CC(C(=O)O)=CC=C21 UOBYKYZJUGYBDK-UHFFFAOYSA-N 0.000 claims description 2
- 125000004105 2-pyridyl group Chemical group N1=C([*])C([H])=C([H])C([H])=C1[H] 0.000 claims description 2
- 125000003349 3-pyridyl group Chemical group N1=C([H])C([*])=C([H])C([H])=C1[H] 0.000 claims description 2
- 125000000339 4-pyridyl group Chemical group N1=C([H])C([H])=C([*])C([H])=C1[H] 0.000 claims description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- BWLUMTFWVZZZND-UHFFFAOYSA-N Dibenzylamine Chemical compound C=1C=CC=CC=1CNCC1=CC=CC=C1 BWLUMTFWVZZZND-UHFFFAOYSA-N 0.000 claims description 2
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 2
- CKLJMWTZIZZHCS-REOHCLBHSA-N L-aspartic acid Chemical compound OC(=O)[C@@H](N)CC(O)=O CKLJMWTZIZZHCS-REOHCLBHSA-N 0.000 claims description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N Phenanthrene Natural products C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 claims description 2
- PCNDJXKNXGMECE-UHFFFAOYSA-N Phenazine Natural products C1=CC=CC2=NC3=CC=CC=C3N=C21 PCNDJXKNXGMECE-UHFFFAOYSA-N 0.000 claims description 2
- WTKZEGDFNFYCGP-UHFFFAOYSA-N Pyrazole Chemical compound C=1C=NNC=1 WTKZEGDFNFYCGP-UHFFFAOYSA-N 0.000 claims description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 239000003513 alkali Substances 0.000 claims description 2
- BJEPYKJPYRNKOW-UHFFFAOYSA-N alpha-hydroxysuccinic acid Natural products OC(=O)C(O)CC(O)=O BJEPYKJPYRNKOW-UHFFFAOYSA-N 0.000 claims description 2
- MWPLVEDNUUSJAV-UHFFFAOYSA-N anthracene Natural products C1=CC=CC2=CC3=CC=CC=C3C=C21 MWPLVEDNUUSJAV-UHFFFAOYSA-N 0.000 claims description 2
- 229940054051 antipsychotic indole derivative Drugs 0.000 claims description 2
- 235000009582 asparagine Nutrition 0.000 claims description 2
- 229960001230 asparagine Drugs 0.000 claims description 2
- 235000003704 aspartic acid Nutrition 0.000 claims description 2
- SRSXLGNVWSONIS-UHFFFAOYSA-M benzenesulfonate Chemical compound [O-]S(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-M 0.000 claims description 2
- SRSXLGNVWSONIS-UHFFFAOYSA-N benzenesulfonic acid Chemical compound OS(=O)(=O)C1=CC=CC=C1 SRSXLGNVWSONIS-UHFFFAOYSA-N 0.000 claims description 2
- 229940092714 benzenesulfonic acid Drugs 0.000 claims description 2
- 125000001797 benzyl group Chemical group [H]C1=C([H])C([H])=C(C([H])=C1[H])C([H])([H])* 0.000 claims description 2
- OQFSQFPPLPISGP-UHFFFAOYSA-N beta-carboxyaspartic acid Natural products OC(=O)C(N)C(C(O)=O)C(O)=O OQFSQFPPLPISGP-UHFFFAOYSA-N 0.000 claims description 2
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 claims description 2
- 229910052794 bromium Inorganic materials 0.000 claims description 2
- 125000001246 bromo group Chemical group Br* 0.000 claims description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 2
- 239000000460 chlorine Substances 0.000 claims description 2
- OEYIOHPDSNJKLS-UHFFFAOYSA-N choline Chemical compound C[N+](C)(C)CCO OEYIOHPDSNJKLS-UHFFFAOYSA-N 0.000 claims description 2
- 229960001231 choline Drugs 0.000 claims description 2
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims description 2
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 claims description 2
- 125000004427 diamine group Chemical group 0.000 claims description 2
- 239000001530 fumaric acid Substances 0.000 claims description 2
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 claims description 2
- 150000002475 indoles Chemical class 0.000 claims description 2
- 150000002500 ions Chemical class 0.000 claims description 2
- LVPMIMZXDYBCDF-UHFFFAOYSA-N isocinchomeronic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)N=C1 LVPMIMZXDYBCDF-UHFFFAOYSA-N 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- 239000001630 malic acid Substances 0.000 claims description 2
- 235000011090 malic acid Nutrition 0.000 claims description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N naphthalene-acid Natural products C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 claims description 2
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 claims description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims description 2
- SIOXPEMLGUPBBT-UHFFFAOYSA-N picolinic acid Chemical compound OC(=O)C1=CC=CC=N1 SIOXPEMLGUPBBT-UHFFFAOYSA-N 0.000 claims description 2
- GJAWHXHKYYXBSV-UHFFFAOYSA-N pyridinedicarboxylic acid Natural products OC(=O)C1=CC=CN=C1C(O)=O GJAWHXHKYYXBSV-UHFFFAOYSA-N 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- YBRBMKDOPFTVDT-UHFFFAOYSA-N tert-butylamine Chemical compound CC(C)(C)N YBRBMKDOPFTVDT-UHFFFAOYSA-N 0.000 claims description 2
- 150000002431 hydrogen Chemical class 0.000 claims 2
- VIBOGIYPPWLDTI-UHFFFAOYSA-N 2-naphthylacetic acid Chemical compound C1=CC=CC2=CC(CC(=O)O)=CC=C21 VIBOGIYPPWLDTI-UHFFFAOYSA-N 0.000 claims 1
- ITBPIKUGMIZTJR-UHFFFAOYSA-N [bis(hydroxymethyl)amino]methanol Chemical compound OCN(CO)CO ITBPIKUGMIZTJR-UHFFFAOYSA-N 0.000 claims 1
- 125000004170 methylsulfonyl group Chemical group [H]C([H])([H])S(*)(=O)=O 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 24
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 21
- 239000000243 solution Substances 0.000 description 21
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 18
- BZLVMXJERCGZMT-UHFFFAOYSA-N Methyl tert-butyl ether Chemical compound COC(C)(C)C BZLVMXJERCGZMT-UHFFFAOYSA-N 0.000 description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 15
- 239000012074 organic phase Substances 0.000 description 14
- WEVYAHXRMPXWCK-UHFFFAOYSA-N Acetonitrile Chemical compound CC#N WEVYAHXRMPXWCK-UHFFFAOYSA-N 0.000 description 12
- IXCSERBJSXMMFS-UHFFFAOYSA-N hydrogen chloride Substances Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 10
- 229910000041 hydrogen chloride Inorganic materials 0.000 description 10
- WYURNTSHIVDZCO-UHFFFAOYSA-N tetrahydrofuran Substances C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 9
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 8
- 239000003960 organic solvent Substances 0.000 description 7
- 238000003756 stirring Methods 0.000 description 7
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 6
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 6
- 150000001298 alcohols Chemical class 0.000 description 6
- 238000007257 deesterification reaction Methods 0.000 description 6
- IRMPFYJSHJGOPE-UHFFFAOYSA-N olivetol Chemical compound CCCCCC1=CC(O)=CC(O)=C1 IRMPFYJSHJGOPE-UHFFFAOYSA-N 0.000 description 6
- 125000001216 2-naphthoyl group Chemical group C1=C(C=CC2=CC=CC=C12)C(=O)* 0.000 description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 5
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical class [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 5
- 150000001412 amines Chemical group 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000003921 oil Substances 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- 229910052786 argon Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002425 crystallisation Methods 0.000 description 4
- 230000008025 crystallization Effects 0.000 description 4
- 238000004821 distillation Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 229960000583 acetic acid Drugs 0.000 description 3
- 239000000010 aprotic solvent Substances 0.000 description 3
- 239000012062 aqueous buffer Substances 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000012362 glacial acetic acid Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000004215 Carbon black (E152) Substances 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical class [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 2
- 150000001408 amides Chemical class 0.000 description 2
- 239000012296 anti-solvent Substances 0.000 description 2
- 238000013375 chromatographic separation Methods 0.000 description 2
- 238000004587 chromatography analysis Methods 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- HCAWPGARWVBULJ-IAGOWNOFSA-N delta8-THC Chemical compound C1C(C)=CC[C@H]2C(C)(C)OC3=CC(CCCCC)=CC(O)=C3[C@@H]21 HCAWPGARWVBULJ-IAGOWNOFSA-N 0.000 description 2
- 238000007700 distillative separation Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229930195733 hydrocarbon Natural products 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 2
- 238000006317 isomerization reaction Methods 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- NSNPSJGHTQIXDO-UHFFFAOYSA-N naphthalene-1-carbonyl chloride Chemical compound C1=CC=C2C(C(=O)Cl)=CC=CC2=C1 NSNPSJGHTQIXDO-UHFFFAOYSA-N 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 235000005074 zinc chloride Nutrition 0.000 description 2
- 239000011592 zinc chloride Substances 0.000 description 2
- MKPMHJQMNACGDI-NXEZZACHSA-N (1s,4s)-1-methyl-4-prop-1-en-2-ylcyclohex-2-en-1-ol Chemical compound CC(=C)[C@H]1CC[C@](C)(O)C=C1 MKPMHJQMNACGDI-NXEZZACHSA-N 0.000 description 1
- UIMAEYMKYMNCGW-UHFFFAOYSA-N (R)-p-Mentha-1,8-dien-10-ol Chemical compound CC1=CCC(C(=C)CO)CC1 UIMAEYMKYMNCGW-UHFFFAOYSA-N 0.000 description 1
- 125000001088 1-naphthoyl group Chemical group C1(=CC=CC2=CC=CC=C12)C(=O)* 0.000 description 1
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- NLEVIOOKPQTISZ-UHFFFAOYSA-N 5-pentylbenzene-1,3-diol;1-pentylcyclohexa-3,5-diene-1,3-diol Chemical compound CCCCCC1=CC(O)=CC(O)=C1.CCCCCC1(O)CC(O)=CC=C1 NLEVIOOKPQTISZ-UHFFFAOYSA-N 0.000 description 1
- 241000251468 Actinopterygii Species 0.000 description 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- DCXYFEDJOCDNAF-REOHCLBHSA-N L-asparagine Chemical compound OC(=O)[C@@H](N)CC(N)=O DCXYFEDJOCDNAF-REOHCLBHSA-N 0.000 description 1
- 239000002841 Lewis acid Substances 0.000 description 1
- 241000287181 Sturnus vulgaris Species 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 239000008346 aqueous phase Substances 0.000 description 1
- 239000007853 buffer solution Substances 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 125000006297 carbonyl amino group Chemical group [H]N([*:2])C([*:1])=O 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000012230 colorless oil Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000000706 filtrate Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 239000000543 intermediate Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 150000007517 lewis acids Chemical class 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000004682 monohydrates Chemical class 0.000 description 1
- XNLBCXGRQWUJLU-UHFFFAOYSA-N naphthalene-2-carbonyl chloride Chemical compound C1=CC=CC2=CC(C(=O)Cl)=CC=C21 XNLBCXGRQWUJLU-UHFFFAOYSA-N 0.000 description 1
- 125000001038 naphthoyl group Chemical group C1(=CC=CC2=CC=CC=C12)C(=O)* 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 238000005580 one pot reaction Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000003880 polar aprotic solvent Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002953 preparative HPLC Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 239000011877 solvent mixture Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000012258 stirred mixture Substances 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D311/00—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings
- C07D311/02—Heterocyclic compounds containing six-membered rings having one oxygen atom as the only hetero atom, condensed with other rings ortho- or peri-condensed with carbocyclic rings or ring systems
- C07D311/78—Ring systems having three or more relevant rings
- C07D311/80—Dibenzopyrans; Hydrogenated dibenzopyrans
Definitions
- the present invention relates to a process for the recovery of pure tetrahydrocannabinol, in particular of pure ⁇ 8 -tetrahydrocannabinol ( ⁇ 8 -THC) and pure ⁇ 9 -Tertravracannabinol ( ⁇ 9 -THC), in particular stereospezi ⁇ fish (enantiomeric ) pure (-) ⁇ 8 -THC and stereospecific (enantiomerically) pure (-) ⁇ 9 -THC.
- ⁇ 8 -tetrahydrocannabinol ( ⁇ 8 -THC) and ⁇ 9 -tetrahydrocannabinol ( ⁇ 9 -THC) are known compounds and can be obtained, for example, as extract from the plant Cannabis sativa L. Chemical syntheses for these compounds are also known.
- No. 3,560,528 describes a process for preparing ⁇ 8 -THC by reacting trans-p-mentha-2,8-dien-1-ol with 3-n-pentyl-resorcinol (olivetol) in the presence of a catalytically active compound , US Pat. No.
- 3,668,224 describes the preparation of ⁇ 9 -THC by attaching, for example, hydrogen chloride to the ⁇ 8 -double bond of ⁇ 8 -THC, where the chlorine atom binds in the 9-position, and then cleaves off hydrogen chloride , where ⁇ 9 -THC forms.
- ⁇ 8 -THC and ⁇ 9 -THC are generally carried out by isolating ⁇ 8 -THC and ⁇ 9 -THC from the reaction mixture with a suitable organic solvent and, if appropriate, subsequently dissolving the solution ⁇ medium away.
- ⁇ 8 -THC or ⁇ 9 -THC is obtained as a "crude product" dissolved in a solvent or in an oily form without a solvent.
- These crude products containing ⁇ 8 -THC or ⁇ 9 -THC contain impurities as impurities. weighing starting materials and reaction by-products (eg, isomers), from which ⁇ 8 -THC or ⁇ 9 -THC have to be separated.
- the THC compounds prepared in this way as crude products are purified by means of chromatographic methods and / or distillation. Die ⁇ se methods are generally not suitable for the purification of THC compounds on a technical scale.
- the chromatographic separation requires a large amount of solvent, the subsequent removal of which is complicated.
- it is disadvantageous for the distillative separation that the isomeric THC compounds to be separated are very similar both in their boiling points and in their polarities, so that very high demands must be placed on the separation performance of the devices. This requires a reduced material throughput, whereby even at high separation efficiency in larger quantities "Misch ⁇ fractions" incurred, which significantly reduces the yield.
- these THC compounds have comparatively high boiling points in the range of 150 ° C.
- the pure tetrahydrocannabinol compounds in particular pure ⁇ 8 -THC or pure ⁇ 9 -THC, can be obtained in very high purity by conventional chemical methods and conventional extractive purification.
- the recovery of pure tetrahydrocannabinol compounds, such as pure ⁇ 8 -THC or ⁇ 9 -THC, is substantially simplified in this way and complicated chromatographic or distillative separation is not necessary. It is also advantageous that the process according to the invention can be used for all corresponding crude products, independently of the particular synthesis used.
- the present invention relates to a process for the extraction of pure tetrahydrocannabinol from tetrahydrocannabinol compound-containing reaction mixtures or from Tetrahydrocannabinol compounds containing crude product, characterized in that the tetrahydro rannan benzin compound in the reaction mixture or in Roh ⁇ product, preferably below Use of a suitable solvent, converted into a crystallizable derivatives, this crystallized and isolated, and then the pure tetrahydrocannabinol compound from the crystallized derivative wins.
- the pure tetrahydrocannabinol compound is obtained as a colorless oil which, when cooled, forms a glass. stares. Further purification steps, eg a distillation or preparative HPLC, are not required.
- the vorlie ⁇ invention preferably relates to a method for obtaining pure ⁇ 8 -THC or ⁇ 9 -THC from ⁇ 8 -THC and / or ⁇ 9 -THC containing reaction mixture or crude product by the ⁇ 8 - contained therein THC or ⁇ 9 -THC converts into a crystallizable derivatives, this crystallized and isolated, and then the pure ⁇ 8 -THC or the pure ⁇ 9 -THC, wins from the crystallized derivative.
- Preference is given to obtaining stereospecific (enantiomerically) pure ⁇ 8 -THC and stereospecific (enantiomerically) pure ⁇ 9 -THC.
- the present invention also relates to the pure tetrahydrocannabinol compounds prepared in this way, in particular the pure compounds ⁇ 8 -THC and ⁇ 9 -THC prepared according to the invention.
- the present invention also relates to the crystallizable derivatives of the tetrahydrocannabinol compounds used as intermediate product and to the crystallized derivatives of the tetrahydrocanna-binol compounds used as intermediates, in particular those of ⁇ 8 -THC and ⁇ 9 -THC.
- the present invention further relates to the use of the compounds prepared according to the invention for the production of a medicament for human therapy and the medicaments prepared in this way.
- tetrahydrocannabinol compounds means compounds of the following formulas (I) and (IA):
- R 1 hydrogen, chlorine, (Ci_i 0 ) alkyl, preferably nC 5 Hn.
- Crystallizable derivatives of tetrahydrocannabinol compounds which are prepared in virtually quantitative yield. and can be crystallized from solutions are, for example, the 2-naphthoyl ester of ⁇ 8 -THC of the formula (II) and the 2-naphthoyl ester of ⁇ 9 -THC, the formula (IIA):
- the naphthoyl radical may be substituted, for example by nitro, bromo or methyl groups, preferably in position 5 or 8.
- the corresponding substituted 1-naphthoyl compounds may also be present.
- the amide-bound naphthyl radicals and also polycyclic carboxylic acid derivatives, for example derivatives of 9-anthracenecarboxylic acid or 9-phenanthrenecarboxylic acid, optionally substituted analogously to the naphthoyl derivatives, are crystallizable.
- esters and amide compounds of ⁇ 8 -THC and ⁇ 9 -THC which contain a salt-capable group in the ester or amide substituent, for example a carboxyl group or an amine moiety.
- crystallizable tetrahydrocannabinol compounds which can be used in the process according to the invention are encompassed by the following formulas (III) and (IIIA):
- Ri is hydrogen, chloro, (Ci-io) -alkyl, preferably nC 5 Hii;
- X is -O- or -NH-, preferably -O- (oxygen); and R 2 is an optionally substituted aliphatic or aromatic radical which optionally carries a substituent capable of forming a salt; or a heterocyclic radical which may itself be capable of salt formation and / or optionally bears a substituent capable of salt formation; or a residue of an aliphatic or aromatic polybasic acid, preferably a dibasic acid, which does not correspond to the
- THC derivative-bonded acid group preferably forms a salt-capable radical or is connected to such or the compound is a salt.
- Ri as (Ci-io) -alkyl is preferably methyl, ethyl, propyl, butyl, pentyl, hexyl, preferably nC 5 Hu.
- R 2 as alifatic radical, which preferably carries a salt-capable radical, preferably denotes optionally substituted corresponding methyl, ethyl, propyl, butyl, benzyl, aminobenzyl, cyclopentyl or cyclohexyl.
- R 2 as an aromatic radical which optionally carries a substituent capable of salt formation preferably denotes phenyl optionally substituted by nitro, halogen, methyl or sulfonyl or naphthyl optionally substituted by nitro, halogen, methyl or sulfonyl, preferably unsubstituted naphthyl.
- R 2 is a heterocyclic radical which is optionally itself capable of salt formation and / or optionally carries a substituent capable of salt formation, is, for example, 2-pyridyl, 3-pyridyl, 4-pyridyl, the corresponding picoline, Pyrazine, pyrazole, pyrrole or indole derivatives, preferably substituents derived from pyridinecarboxylic acid or pyridinedicarboxylic acid.
- R 2 may also be asparagine [-O (O) C-CH (NH 2 ) -CH 2 CONH 2 ] or aspartic acid [-O (O) C-CH (NH 2 ) CH 2 -C (O) OH] ,
- R 2 as the radical of an aromatic di- or polycarboxylic acid preferably denotes the radical of phthalic acid or terephthalic acid, wherein the acid group not bonded to the THC derivative is optionally bonded to a salt capable of forming a salt.
- the acid group not attached to the THC derivative can be linked to a diamine by means of an amide bond.
- salt formation can take place with the salt capable of forming a salt or with the diamine residue and, for example, the corresponding hydro- chloride or hydrobromide, nitrate, oxalate or salts with methylsulfonic acid, toluenesulfonic acid or benzenesulfonic acid.
- the following ⁇ 9 -THC derivative as base or as salt, can be prepared and crystallized in pure form, the pure ⁇ 9 -THC subsequently being able to be recovered from the derivative with per se known hydrolysis.
- substituents are preferably bromine, nitro, methyl, preferably in the 5- or 8-position.
- ester derivatives of tetrahydrocannabinol compounds preferably of ⁇ 8 -THC and ⁇ 9 -THC, with polycyclic carboxylic acids, such as 9-anthracenecarboxylic acid or 9-phenanthrenecarboxylic acid, whose anthracene radical or phenanthrene radical is optionally substituted.
- polycyclic carboxylic acids such as 9-anthracenecarboxylic acid or 9-phenanthrenecarboxylic acid, whose anthracene radical or phenanthrene radical is optionally substituted.
- salts of ester derivatives of tetrahydrocannabinol compounds preferably of ⁇ 8 -THC and ⁇ 9 -THC, with dicarboxylic acids such as phthalic acid, terephthalic acid or oxalic acid with a suitable counterion as cation, this cation preferably an alkali or Alkaline earth ion, preferably Na + , K + , Ca +2 or Mg +2 or ammonium or a primary secondary or tertiary ammonium ion.
- Suitable ammonium ions are, for example, the cations of the following amines: dibenzylamine, tert-butylamine, choline, trishydroxymethylamine, ethylenediamine.
- Salts of ester derivatives of tetrahydrocannabinol compounds preferably of ⁇ 8 -THC and ⁇ 9 -THC, with dicarboxylic acids, such as phthalic acid, terephthalic acid or oxalic acid, which are attached to the free carboxyl group (not bonded to the THC derivative) are also preferred with a diamine, preferably with piperazine or N-methypiperazine, are linked via an amide bond, and the salt vor ⁇ preferably as hydrochloride, hydrobromide, nitrate, oxalate, tosylate, mesylate, or besylate present.
- the corresponding N-methylpiperazine derivative of phthalic acid is hydrochloride.
- Catalyst preferably p-toluenesulfonic acid or BF 3 Et 2 O at elevated temperature, preferably higher than 50 0 C. (> 50 ° C), preferably higher than 80 0 C (> 80 ° C), in a non-reactive organic solvent, for example in toluene, to ⁇ 8 -THC reacted (or ⁇ 9 -THC at BF 3 -Et 2 O. ).
- crude ⁇ 8 -THC or ⁇ 9 -THC in BF 3 Et 2 O
- the protection of any reactive groups is not required (Literature: Petrzilka, Helvetica Chimica Acta 1969, 52, 1102; Radzan, J. Am. Chem. Soc., 1974, 96, 5860, cited above).
- the crude ⁇ 8 -THC naphthoyl ester is dissolved in a water-immiscible aprotic solvent and treated with a desired naphthoic acid chloride using a base, preferably a tertiary amine, at 0-100 0 C, preferably 20-25 0 C reacted to the ester.
- a base preferably a tertiary amine
- the reaction mixture is washed with aqueous buffer solution.
- methanol or another suitable alcohol the ⁇ 8 -THC naphthoyl ester is precipitated from the solvent.
- the crude ⁇ 8 -THC naphthoyl ester can be recrystallized from a variety of organic solvents (e.g., acetonitrile).
- ⁇ 8 -THC For the recovery of ⁇ 8 -THC from the ⁇ 8 -THC-naphthoyl ester is the latter at 0-100 0 C, preferably at room temperature, in a mixture of water-miscible solvents (eg, THF and / or alcohols and / or acetone ) and water with a soluble in this solvent mixture strong base (eg sodium hydroxide or diethylamine), preferably hydroxydases, saponified.
- strong base eg sodium hydroxide or diethylamine
- the organic solvent is distilled off from the reaction mixture, and the aqueous-oily residue is extracted with a non-water-miscible solvent (eg, a hydrocarbon). After evaporation of the organic phase, the ⁇ 8 -THC is obtained.
- a non-water-miscible solvent eg, a hydrocarbon
- ⁇ 8 -THC is preferably dissolved in a water-immiscible solvent, for example ethyl acetate.
- a water-immiscible solvent for example ethyl acetate.
- HCl gas By introducing HCl gas, the reaction mixture is saturated with HCl.
- a Lewis acid eg zinc chloride, and stirred the mixture at 0-50 0 C Letsge ⁇ .
- the reaction mixture is washed first with water and then with aqueous buffer solution.
- the organic phase is evaporated and the residue is dissolved in a water-immiscible solvent, for example in toluene.
- an excess of a solution of an alkoxide in the appropriate solvent for example in toluene, is added and the reaction mixture is heated until the elimination of
- the crude ⁇ 9 -THC naphthoyl ester (containing ⁇ 5% ⁇ 8 -THC naphthoyl ester) is dissolved in a suitable organic solvent, for example THF.
- a suitable organic solvent for example THF.
- the enriched ⁇ 9 -THC naphthoyl ester (reduction of the ⁇ 8 -THC naphthoyl ester by 25-90%, as a rule by about 50%) is precipitated by addition of a suitable alcohol.
- ⁇ 9 -THC is dissolved in a suitable solvent, for example THF, and at least in one equivalent of water, with a strong base soluble in it, for example a diamine and at 0-100 0 C, preferably stirred at room temperature until the ester cleavage is complete. Then, a little water is added and the ⁇ 9 -THC extracted with a unpo ⁇ laren organic solvent, optionally after vor ⁇ usual distilling off the Scheme ⁇ for the ester cleavage set solvent. The organic phase is evaporated and dried under high vacuum.
- a suitable solvent for example THF
- a strong base soluble in it for example a diamine and at 0-100 0 C
- THC compounds The preparation of the THC compounds is known per se from the literature.
- the ester formation can be carried out by analogous process conditions known per se for the reaction of an alcohol with an acid chloride or, if appropriate, another activated acid derivative (anhydride). chloride, bromide) with base addition.
- the choice of base is largely arbitrary and known from analogous methods.
- Suitable solvents are all aprotic solvents. Temperatures in the range of the melting to boiling points of the solvents are prin ciple possible (to at least 100 0 C).
- the THC esters can be crystallized / recrystallized in suitable solvents or combinations of solvent / anti-solvent.
- the solvents are substance-dependent.
- aprotic solvents preferably polar aprotic solvents (for example THF, acetonitrile, acetone) are suitable as solvents.
- anti-solvents are particularly suitable
- Alcohols e.g. polar alcohols, such as methanol or ethanol or higher (nonpolar and polar) alcohols, and optionally (if miscible with the solvent) also water.
- the ester cleavage takes place according to the known method of converting an ester and water with a strong base (pH> 10, preferably at pH> 12).
- Suitable bases are inorganic bases (if soluble in the solvent chosen) or amines. Due to the required pH, stronger amines such as diamines are preferred.
- Solvents are all solvents into consideration, in which ester, base and at least small amounts of water dissolve and which are inert in the chosen system. Preference is given to water-miscible solvents, such as alcohols, THF or acetonitrile, or poorly water-miscible solvents having a certain residual polarity (for example ether, dichloromethane, toluene). Temperatures in the range from the melting point to the boiling point of the Engels ⁇ means are in principle possible (to at least 100 0 C).
- the THC compounds are purified by picking them up in a water-immiscible solvent (either directly from the ester cleavage, or, if the solvent used there is water-soluble, by concentration of the mixture, if appropriate after neutralization, and addition a water-immiscible Wegs ⁇ means) optionally with the addition of water. Then the impurities (base for ester cleavage, acid for neutralization, naphthoic acid anion) are extracted into the aqueous phase. For the purification, a hydrocarbon is preferred as the solvent, since thereby the separation of the impurities is more effective. The organic phase is then concentrated and dried in vacuo from the extraction solvent.
- THC esters of simple acids In the synthesis of THC esters with diacids or their derivatives, a counterion for the precipitation still has to be added, the conditions being uncritical and known from analogous reactions, and the solvents being optionally adjusted, as mentioned above in the text. It can Alcohols from non-solvents to solvents.
- aqueous residue is taken up in 140 ml of water and extracted with 100 ml and 50 ml of MTBE (methyl tert-butyl ether), the organic phase is extracted 4-5 times with half-saturated NaHCO 3 solution (100 ml each) and finally with Washed saturated NaCl solution. Drying over MgSO 4 and evaporating the solvent gives about 10.7 g of amber oil (GC:> 95% ⁇ 8 -THC).
- MTBE methyl tert-butyl ether
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- Chemical & Material Sciences (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CH2004/000458 WO2006007734A1 (en) | 2004-07-19 | 2004-07-19 | Method for obtaining pure tetrahydrocannabinol |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP1773801A1 true EP1773801A1 (en) | 2007-04-18 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04738098A Withdrawn EP1773801A1 (en) | 2004-07-19 | 2004-07-19 | Method for obtaining pure tetrahydrocannabinol |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7923558B2 (en) |
| EP (1) | EP1773801A1 (en) |
| CN (1) | CN1997636B (en) |
| CA (1) | CA2573859A1 (en) |
| WO (1) | WO2006007734A1 (en) |
Families Citing this family (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI369203B (en) * | 2004-11-22 | 2012-08-01 | Euro Celtique Sa | Methods for purifying trans-(-)-△9-tetrahydrocannabinol and trans-(+)-△9-tetrahydrocannabinol |
| TWI366460B (en) * | 2005-06-16 | 2012-06-21 | Euro Celtique Sa | Cannabinoid active pharmaceutical ingredient for improved dosage forms |
| CN101316832A (en) | 2005-09-29 | 2008-12-03 | Amr科技公司 | Method for producing delta-9-tetrahydrocannabinol |
| SI2215071T1 (en) | 2007-11-30 | 2015-12-31 | Zynerba Pharmaceuticals, Inc. | Prodrugs of tetrahydrocannabinol, compositions comprising prodrugs of tetrahydrocannabinol and methods of using the same |
| US9380813B2 (en) | 2014-02-11 | 2016-07-05 | Timothy McCullough | Drug delivery system and method |
| US9220294B2 (en) | 2014-02-11 | 2015-12-29 | Timothy McCullough | Methods and devices using cannabis vapors |
| US10821240B2 (en) | 2014-02-11 | 2020-11-03 | Vapor Cartridge Technology Llc | Methods and drug delivery devices using cannabis |
| US9539295B2 (en) | 2014-12-05 | 2017-01-10 | Bradley Michael Bohus | Cannabidiol (CBD) enriched alcohol |
| CN107567435B (en) * | 2015-01-22 | 2019-08-09 | 植物研究公司 | Method for purifying cannabinoids, cannabinoid compositions and kits |
| WO2017194173A1 (en) | 2016-05-13 | 2017-11-16 | Symrise Ag | Method for purifying cannabinoid compounds |
| US10239808B1 (en) | 2016-12-07 | 2019-03-26 | Canopy Holdings, LLC | Cannabis extracts |
| EP3745884A1 (en) | 2018-01-31 | 2020-12-09 | Canopy Holdings, Llc | Hemp powder |
| WO2019173582A1 (en) * | 2018-03-07 | 2019-09-12 | Socati Technologies | Continuous isolation of cannabidiol and conversion of cannabidiol to delta 8-tetrahydrocannabinol and delta 9-tetrahydrocannabinol |
| US11851415B2 (en) | 2018-03-07 | 2023-12-26 | Cleen Technology Inc. | Continuous isolation of cannabidiol and cannabinoids and conversion of cannabidiol to delta 8-tetrahydrocannabinol and delta 9-tetrahydrocannabinol |
| US11192870B2 (en) | 2018-03-07 | 2021-12-07 | Socati Technologies—Oregon, Llc | Continuous isolation of cannabidiol and conversion of cannabidiol to delta 8-tetrahydrocannabinol and delta 9-tetrahydrocannabinol |
| US11040932B2 (en) | 2018-10-10 | 2021-06-22 | Treehouse Biotech, Inc. | Synthesis of cannabigerol |
| WO2020248057A1 (en) * | 2019-06-11 | 2020-12-17 | Canopy Growth Corporation | Methods for preparing cannabinoids by heterogeneous-acid-promoted double-bond migration |
| WO2020248058A1 (en) | 2019-06-11 | 2020-12-17 | Canopy Growth Corporation | Improved methods for converting cannabidiol into delta 8-tetrahydrocannabinol |
| CN110229135A (en) * | 2019-07-10 | 2019-09-13 | 朱法科 | Method for producing high-purity tetrahydrocannabinol by chromatography |
| EP4030941A1 (en) | 2019-09-16 | 2022-07-27 | Vapor Cartridge Technology LLC | Drug delivery system with stackable substrates |
| WO2021076633A1 (en) | 2019-10-14 | 2021-04-22 | Purisys Llc | Polymorphs of d9-thc naphthoylester |
| US11746113B2 (en) | 2020-03-19 | 2023-09-05 | Alexandros Makriyannis | Labelled cannabinergic ligands and related analogs |
| US12029718B2 (en) | 2021-11-09 | 2024-07-09 | Cct Sciences, Llc | Process for production of essentially pure delta-9-tetrahydrocannabinol |
| CN115583933B (en) * | 2022-10-31 | 2024-02-06 | 暨明医药科技(苏州)有限公司 | Preparation method of high-purity tetrahydrocannabinoid homolog |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH481911A (en) | 1967-05-19 | 1969-11-30 | Theodor Dr Petrzilka | Process for the preparation of tricyclic compounds |
| JPS5518709B2 (en) | 1970-02-13 | 1980-05-21 | ||
| US3668224A (en) | 1970-07-02 | 1972-06-06 | Theodor Petrzilka | PROCESS OF PRODUCING 6a, 10a-TRANS-6a,7,8,10a-TETRAHYDRODIBENZO (b,d)-PYRANS |
| US3941782A (en) * | 1972-04-27 | 1976-03-02 | Sharps Associates | Heterocyclic esters of benzopyrans |
| US4025630A (en) * | 1973-09-19 | 1977-05-24 | Abbott Laboratories | Anesthesia methods using benzopyrans and esters thereof as pre-anesthesia medication |
| IL48824A (en) | 1976-01-12 | 1980-05-30 | Yissum Res Dev Co | Pharmaceutical compositions containing (3s,js) tetrahydrocanabinol derivatives and some novel compounds of this type |
| US4381399A (en) | 1981-12-21 | 1983-04-26 | Aerojet-General Corporation | Purification of tetrahydrodibenzo[b,d]pyrans from crude synthetic mixtures |
| US4933363A (en) | 1988-08-16 | 1990-06-12 | Elsohly Mahmoud A | Method for effecting systemic delivery of delta-9-tetrahydrocannabinol |
| US5389375A (en) | 1993-05-21 | 1995-02-14 | University Of Mississippi | Stable suppository formulations effecting bioavailability of Δ9 -thc |
| CA2504743C (en) | 2002-11-12 | 2012-04-24 | Mallinckrodt Inc. | Cannabinoid crystalline derivatives and process of cannabinoid purification |
-
2004
- 2004-07-19 EP EP04738098A patent/EP1773801A1/en not_active Withdrawn
- 2004-07-19 CA CA002573859A patent/CA2573859A1/en not_active Abandoned
- 2004-07-19 CN CN2004800436265A patent/CN1997636B/en not_active Expired - Fee Related
- 2004-07-19 US US11/571,864 patent/US7923558B2/en active Active
- 2004-07-19 WO PCT/CH2004/000458 patent/WO2006007734A1/en not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2006007734A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1997636A (en) | 2007-07-11 |
| US7923558B2 (en) | 2011-04-12 |
| CA2573859A1 (en) | 2006-01-26 |
| CN1997636B (en) | 2011-09-28 |
| US20080275237A1 (en) | 2008-11-06 |
| WO2006007734A1 (en) | 2006-01-26 |
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