WO1993012120A1 - Derive de pyrazolothiazolopyrimidine - Google Patents
Derive de pyrazolothiazolopyrimidine Download PDFInfo
- Publication number
- WO1993012120A1 WO1993012120A1 PCT/JP1992/001595 JP9201595W WO9312120A1 WO 1993012120 A1 WO1993012120 A1 WO 1993012120A1 JP 9201595 W JP9201595 W JP 9201595W WO 9312120 A1 WO9312120 A1 WO 9312120A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compound
- substituted
- chloroform
- dissolved
- pyrimidine
- 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.)
- Ceased
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D513/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00
- C07D513/12—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and sulfur atoms as the only ring hetero atoms, not provided for in groups C07D463/00, C07D477/00 or C07D499/00 - C07D507/00 in which the condensed system contains three hetero rings
- C07D513/14—Ortho-condensed systems
Definitions
- the present invention relates to a thiazolopyrimidine derivative of a pyrazo opening which is useful as an anti-inflammatory agent, an analgesic agent, an immunomodulator, and an anti-ulcer agent.
- 6,7-Dihydropyrazo [3,4-d] thiazolo [3,2-a] pyrimidine A tricyclic compound with a 4-one skeleton, which has a substituent on the 2-position nitrogen atom.
- 7-Dihydro 2-methylpyrazo [3,4-d] thiazolo [3,2-a] pyrimidin-1 4 (2H) -one is described in Liebigs Ann. Chem., 1121 (1987). .
- R 1 is hydrogen, substituted or unsubstituted lower alkyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl, halogen or 1 NR 3 R 4 (wherein R 3 and R 4 are the same or different and represent hydrogen, lower alkyl, lower alkanoyl or aroyl), and when R 2 is substituted at the 1-position, X represents ⁇ or CH; R 2 is hydrogen, substituted Or unsubstituted lower alkyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl or lower alkoxycarbonyl, and when R 2 is substituted at the 2-position, X is ⁇ And R 2 is
- R 5 is a substituted or unsubstituted lower alkyl
- R 6 and R 7 are the same or different and represent hydrogen or lower alkyl
- Y represents O or S
- Q represents one CR 8 R 9 CR R 11 — (CH 2 )ticianone or
- CR 8 CR 8 1 (CH 2 ) ⁇ - (wherein R 8 , R 9 , R 1 and R 11 are the same or different and are hydrogen, substituted or unsubstituted lower alkyl, substituted or Represents an unsubstituted aryl, a substituted or unsubstituted aralkyl or a lower alkoxycarbonyl, and ⁇ represents an integer of 0 to 2).]
- a pyrazo-open thiazolopyrimidine derivative [hereinafter, compound ( I). The same applies to compounds of other formula numbers.] Or a pharmacologically acceptable salt thereof can be provided.
- the lower alkyl moiety of lower alkyl, lower alkanoyl and lower alkoxycarbonyl represents a straight-chain or branched alkyl having 1 to 6 carbon atoms, for example, methyl, ethyl, and butyl propyl.
- the aryl portion of aryl and arylo includes phenyl and naphthyl, and the aralkyl includes C7 to C10, for example, benzyl and phenethyl.
- Substituents in substituted lower alkyl, substituted aryl and substituted aralkyl are the same or different and represent halogen having 1 to 3 substituents, carboxyl or lower alkoxycarbonyl, and halogen represents each atom of fluorine, chlorine, bromine, and iodine;
- the lower alkyl part of the lower alkoxycarbonyl has the same definition as that of the lower alkyl.
- Pharmaceutically acceptable salts of compound (I) include acid addition salts / amino acid addition salts.
- the acid addition salts include inorganic salts such as hydrochloride and sulfate, and organic acid salts such as fumarate, tartrate and citrate.
- Amino acid addition salts include lysine, glycine, and fenylara And the like.
- the compound (I) in which R 2 is hydrogen can usually exist as the compounds (I-1) and (I-12) in a tautomeric relationship, and the compound (I-2) is also a compound of the present invention. And is referred to as a compound (I-11) in the following description.
- the compound (la) wherein X is N, Y is ⁇ and R 1 is hydrogen can be obtained according to the following steps.
- Compound (III) is obtained by reacting compound (II) with 1 to 5 equivalents of dimethylformamide in oxychloride at room temperature to 10 G ° C for 30 minutes to 3 hours. Can be. .
- Compound (la) is prepared by combining compound ( ⁇ ) with 2 to 5 equivalents of hydrazine in an inert solvent such as alcohols such as methanol, ethanol and propanol, and toluene or xylene at room temperature to 14 ° C. It can be obtained by reacting at 0 ° C for 1 to 10 hours.
- an inert solvent such as alcohols such as methanol, ethanol and propanol, and toluene or xylene
- the raw material compound ([1]) can be synthesized, for example, by a known method [J. Am. Chem. Soc. 64, 2709 (1942); Zh. Org. Him., 2200 (1975)] or synthesized according to the method. can do.
- Compound (IV) is prepared by reacting compound ( ⁇ ⁇ ) with 1. to 5 equivalents of a Grignard reagent in a solvent inert to a reaction such as ether or tetrahydrofuran at 0 to 60 for 1 to 10 hours.
- Compound (V) can be obtained by reacting compound (IV) with 1 to 5 equivalents of Jones reagent (chromium oxide-sulfuric acid) in acetone at 0 ° C. to room temperature for 1 to 1 equivalent. It can be obtained by reacting for 0 hours.
- Compound (Ib) is prepared by converting compound (V) with 2 to 5 equivalents of hydrazine in an inert solvent such as alcohols such as methanol, ethanol and propanol, toluene and xylene at room temperature to 1 It can be obtained by reacting at 40 ° C for 1 to 10 hours.
- an inert solvent such as alcohols such as methanol, ethanol and propanol, toluene and xylene
- Compound ( ⁇ ) is prepared by reacting compound (in) with 1 to 5 equivalents of hydroxylamine hydrochloride in a reaction-inert solvent such as alcohols such as methanol and ethanol at room temperature to 50 ° C. It can be obtained by reacting for minutes to 3 hours.
- a reaction-inert solvent such as alcohols such as methanol and ethanol
- the compound ( ⁇ ⁇ ) is a compound ( ⁇ ) which is a dehydrating agent such as oxylin chloride, thionyl chloride, enzymatic anhydride, phosphorus pentachloride, and phosphorus pentoxide. It can be obtained by treating with C at room temperature to 100 ° C. for 30 minutes to 5 hours in an active solvent or without solvent.
- a dehydrating agent such as oxylin chloride, thionyl chloride, enzymatic anhydride, phosphorus pentachloride, and phosphorus pentoxide.
- Compound (Ic) is prepared by converting compound (VII) with 2 to 5 equivalents of hydrazine in an inert solvent such as alcohols such as methanol and ethanol, toluene or xylene, at room temperature to 140 ° C. It can be obtained by reacting at 10 ° C. for 1 to 10 ⁇ .
- an inert solvent such as alcohols such as methanol and ethanol, toluene or xylene
- compound (I) in compound (I), X is N, Y is 0, R 1 is a lower Arukanoiru ⁇ Mi Bruno or Aroiruami Bruno, compound (I d) can be obtained by the following process.
- R 2 and Q are as defined above, and R 3e represents lower alkanoyl or aroyl.
- Compound (Id) is an acid chloride or acid equivalent to compound (Ic). It can be obtained by reacting with an anhydride in methylene chloride at 0 to 60 for 1 to 10 hours in pyridine or in the presence of a base such as triethylamine.
- the compound (Ie) is obtained by combining the compound (Ic) or (Id) with 1 to 10 equivalents of an alkyl halide such as methyl iodide or thiolated iodide, and potassium carbonate, sodium hydride or the like.
- an alkyl halide such as methyl iodide or thiolated iodide
- potassium carbonate sodium hydride or the like.
- the compound can be treated at room temperature to 100 at room temperature for 100 minutes to 30 hours.
- Compound (If) is obtained by converting compound (lea) in which R 3 is lower alkanol or aroyl in compound (Ie) with an acidic compound using hydrochloric acid or the like.
- the reaction can be carried out in a mixed solvent of dioxane and water at room temperature to 100 ° C. for 30 minutes to 12 hours.
- Compound (I g) is obtained by dissolving compound (I c) in hydrochloric acid, hydrogen bromide water, etc. Sodium nitrite to give diazonium salt, and then react with 1-5 equivalents of copper halide such as copper chloride, copper bromide, etc. at 0 ° C ⁇ room temperature for 30 minutes to 2 hours. .
- R le represents hydrogen, substituted or unsubstituted lower alkyl, substituted or unsubstituted aryl, substituted or unsubstituted aralkyl or amino
- Compound (Ih) may be obtained by heating compound ( ⁇ ), (V) or (VII) with tert-butyl carbazate without isolating and purifying the compound, or heating it in large excess.
- trifluoroacetic acid-hydrochloric acid at room temperature to 100 ° C for 30 minutes to 5 hours ⁇ Preparation method 9
- R 1 and Q are as defined above, and R 2a represents R 2 other than hydrogen
- Compound (I i) is compound (I h) and compound (I h) in an amount of 1 to 10 equivalents of methyl iodide, propyl iodide, isopropyl iodide, butyl iodide Zirogen alkyls such as butyl butyl, benzyl alkyls, aralkyl halides such as benzyl benzyl, or alkyl formate alkyls such as methyl chloroformate and ethyl ethyl chloroformate, tert-bromoacetic acid
- bases such as potassium carbonate, sodium carbonate, triethylamine, and sodium hydride
- halogenated fatty acid alkyl esters such as tyl cannot react with the reaction of dimethylformamide, dimethylacetamide, dioxane, and acetone. It can be obtained by reacting at room temperature to 100 in an active solvent for 30 minutes to 24 hours.
- the compound (I j) in which X is CH, Y is 0, and R 1 is hydrogen can be obtained according to the following steps.
- Compound ( ⁇ ) can be obtained by treating compound ( ⁇ ) in phosphorus oxychloride at room temperature to 100 ° C. for 30 minutes to 5 hours.
- Compound () is obtained by combining compound ( ⁇ ) with 1 to 5 equivalents of aminoacetoaldehyde dimethyl acetal derivative in the presence of a base such as triethylamine in an alcohol such as methanol, ethanol, or propanol. It can be obtained by reacting at a temperature of 100 to 100 for 30 minutes to 10 hours.
- Compound (Ij) can be obtained by treating compound (IX) in a dehydrating agent such as methanesulfonic acid, polyphosphoric acid, or sulfuric acid at room temperature to 120 for 30 minutes to 24 hours. it can.
- a dehydrating agent such as methanesulfonic acid, polyphosphoric acid, or sulfuric acid
- the compound (Ik) in which Y is S can be subjected to the following steps.
- Compound (Ik) is obtained by treating compound (I1) with 1 to 5 equivalents of phosphorus pentasulfide or Lawesson's reagent at room temperature to 100 ° C for 30 minutes to 10 hours. be able to.
- a reaction solvent toluene-xylene or the like is used when a Lawson reagent is used, and pyridine or the like is used when linyl pentasulfide is used.
- R 1 , R 2 and X are as defined above, and Q ′ is
- the compound (Im) is obtained by converting the compound (X) with 1 to 10 equivalents of an alkyl dihalide such as dibromoethane, dibromopropane, dibromobutane or the like, by using lithium carbonate, sodium carbonate, triethylamine, sodium hydride, or the like.
- an alkyl dihalide such as dibromoethane, dibromopropane, dibromobutane or the like
- lithium carbonate sodium carbonate, triethylamine, sodium hydride, or the like.
- a solvent inert to dimethylformamide, dimethylacetamide, dioxane, acetone, etc. react for 30 minutes to 24 hours at room temperature to 100 ° C. O can be obtained by
- the starting compound (X) can be synthesized by a known method [Helv. Chim. Acta, 42, 349 (1959)].
- Compound (XII) is obtained by converting compound (XI) with 1 to 10 equivalents of thiophosgene into methylene chloride.
- the compound (XIII) can be obtained by reacting the compound (XIII) with the compound (XII) in a solvent inert to the reaction, such as ethyl form, at room temperature to 80 for 30 minutes to 24 hours. Obtained by reacting 10 equivalents of an arylamine derivative in a solvent inert to a reaction such as methylene chloride, toluene, or ether at room temperature to 100 ° C for 30 minutes to 24 hours. Can be.
- Compound (In) can be obtained by treating compound (XIII) in acetic acid containing hydrogen chloride at room temperature to 100 ° C for 30 minutes to 24 hours. Wear.
- the starting compound (XI) can be synthesized by a known method [Helv. Chim. Acta, 42, 349 (1959)].
- Compound (XiV) is prepared by reacting compound (X [[]) with 1 to 10 equivalents of an aminoethanol derivative in a solvent inert to a reaction such as methylene chloride, toluene, or ether at room temperature to 100 ° C. For 30 minutes to 24 hours.
- Compound (I 0) can be obtained by subjecting compound (XiV) to a dehydrating agent such as methanesulfonic acid, polyphosphoric acid, or sulfuric acid at room temperature to 120 for 30 minutes to 24 hours. I can get it. Manufacturing method 1 4
- Compound (Io) can also be obtained according to the following steps.
- R 1 , R 2 , R 8 , R 9 , R′R 11 and X are as defined above, and Z represents a halogen atom
- Compound (I 0) is prepared by subjecting compound (XII) to 1 to 10 equivalents of a halogenated thilamin derivative in a solvent inert to a reaction such as methylene chloride, chloroform, or the like, at room temperature to 100 ° C. For 30 minutes to 24 hours.
- a reaction such as methylene chloride, chloroform, or the like
- Intermediates and target compounds in the above-mentioned production methods can be isolated and purified by purification methods commonly used in organic synthetic chemistry, for example, filtration, extraction, washing, drying, concentration, recrystallization, various chromatographies, etc. it can.
- the intermediate can be subjected to the next reaction without purification.
- compound (I) when it is desired to obtain a salt of compound (I), if compound (I) is obtained in the form of a salt, it can be purified as it is, and if it can be obtained in the free form, it can be dissolved in an appropriate solvent Alternatively, they may be suspended and an acid or an amino acid may be added to form a salt.
- Compound (I) and its pharmacologically acceptable salts may exist in the form of adducts with water or various solvents, and these adducts are also included in the present invention.
- Table 1 shows specific examples of the compound (I) obtained by each production method. Table 1 ⁇ «3 ⁇ 4 No. Real number R 1 R 2 XYQ
- Wister rats male; 150 g were grouped into 5 rats, and the volume of the right hind paw of the rat was measured using a rat hind paw edema volume measuring device (UNICOM TK-101). .
- V t The Power jellyfish emissions administered three o'clock right after ⁇ Yo ⁇ after K
- V 0 Right hind limb foot insult before administration of force lagene Zymosan buoyancy rate (3 ⁇ 4) -Vt V ° ⁇ X 100
- v 0 Right hind paw volume before Zymozan administration
- the test compound was suspended in a 5% gum arabic solution and orally administered 1 hour before administration of the inflammatory substance.
- control group received a 5% gum arabic solution.
- Test example 2 Delayed type hypersensitivity (DTH)
- SRBC 1 ⁇ 10 8 cells / 0.025 ml was injected intradermally into the right hind paw, and physiological saline 0.025 ml was injected into the left hind paw. 24 hours later, the swelling of the right and left feet was measured by DIAL THICKNESS GAUGECPEACOCK, and SR BC The difference between the injection foot and the saline foot was defined as edema (mm). Test compounds.
- the control group was orally administered a 5% gum arabic solution.
- control group edema one test compound administration group edema Ylftft of obtaining the inhibition rate according to the following equation
- mice Male ddd strain mice weighing 18 ⁇ 1 g were used, and each group consisted of 5 mice.
- a D0 nryu male rat fasted for 17 hours (body weight: 190-210 g; 5 test compound-administered groups, 5 control groups) was suspended in 50% polyethylene glycol 400 aqueous solution.
- Each test compound was orally administered, and 30 minutes after administration, the sword-shaped protrusion was immersed in a water bath at 21 ⁇ 1 using a Tokyo University stress-type stress cage, and stress was applied for 7 hours. .
- the rat was killed with carbon dioxide, the stomach was excised, and the length of the dotted and linear erosions and ulcers was measured under a stereoscopic microscope (5x). The sum was defined as the ulcer index of each animal.
- control group and the test compound administration group were compared, and the inhibition rate was determined by the following formula.
- control group was administered a 50% aqueous solution of polyethylene glycol 400 at a dose of S mlZkg.
- Table 6 shows the test results. Table 6 ⁇ ⁇ No.Drug dose Ulcer index Suppression rate
- Compound (I) or a pharmaceutically acceptable salt thereof can be used as it is or in various pharmaceutical forms.
- the pharmaceutical composition of the present invention can be produced by uniformly mixing an effective amount of the compound (I) as an active ingredient or a pharmaceutically acceptable salt thereof with a pharmaceutically acceptable carrier. These pharmaceutical compositions are desirably in a unit dosage form suitable for oral administration.
- any useful pharmacologically acceptable carrier can be used.
- oral liquid preparations such as suspensions and syrups include water, sugars such as sucrose, sorbitol, and fructose; glycols such as polyethylene glycol and propylene glycol; oils such as sesame oil, olive oil and soybean oil.
- preservatives such as ⁇ -hydroxybenzoic acid esters, flavors such as bevel flavor and peppermint.
- Powders, pills, capsules, and tablets contain excipients such as lactose, glucose, sucrose, and mannitol; disintegrants such as starch and sodium alginate; lubricants such as magnesium stearate and talc; It can be produced using binders such as polyvinyl alcohol, hydroxypropyl cellulose, gelatin, surfactants such as fatty acid esters, and plasticizers such as glycerin. Tablets and capsules are the most useful unit oral dosage forms because of their ease of administration. In the production of tablets and capsules, solid pharmaceutical carriers are used.
- the effective dose and frequency of administration of compound (I) or a pharmacologically acceptable salt thereof will vary depending on the mode of administration, patient age, body weight, symptoms, etc., but is generally 1 to 10 times per day. It is preferable to administer 0 mg / kg in 3 to 4 divided doses.
- Example 10 The compound 13, 2.0 g (8.96 mmol) obtained in Example 10 was dissolved in 20 ml of pyridine, and 1.23 ml (13.0 mmol) of acetic anhydride was added. The mixture was stirred at 50 ° C for 6 hours. After evaporating the solvent, the residue was partitioned between chloroform and water, washed with dilute hydrochloric acid and water, and the chloroform layer was evaporated to dryness under reduced pressure and recrystallized from chloroform-ethanol to give the pure title compound. 1.46 g (62 were obtained.
- Example 10 The compound (13, 1.40 g, 6, 27 millimol) obtained in Example 10 was dissolved in pyridine (14 ml), and benzoyl chloride (0.8 O ml, 6.9 millimol) was added. In addition, the mixture was stirred at 50 ° C for 30 minutes. After evaporation of the solvent, the residue The residue was washed with diluted hydrochloric acid and water, and dried under reduced pressure to dryness. After recrystallization from chloroform-ethanol, pure title compound (1.81 g) was obtained. 80 was obtained.
- the precipitated crystals were collected by filtration, washed with water, and then subjected to silica gel column chromatography and eluted with chloroform to obtain the title compound 25, 3.51 g (C68). Further, the compound was obtained as a pure compound by recrystallization from chloroform-ethanol.
- the pore-form layer was depressurized to dryness, subjected to silica gel column chromatography, and purified with chloroform-methanol (100%). : Eluted in 1). 1.89 g (62%) of the title compound 30 was obtained from the first main fraction, and 8.888 g (29996) of the compound 31 was obtained from the second main fraction. Each by recrystallization from ethanol And obtained as a pure compound.
- Methyl 5 an amino 1 —methylvirazole-4 monocarboxylate [Helv. Chim. Acta, 42, 349 (1959)] 6 3.4 g (375 mols) was added to The resultant was dissolved in 0. 0 ml, and thiophosgene 28.5 ml (374 millimoles) was added, followed by heating under reflux for 6 hours. After cooling, the precipitated crystals were filtered off and washed with a black hole form. After the filtrate was dried under reduced pressure, it was subjected to silica gel column chromatography, and eluted with chloroform to obtain 23.6 g (30%) of the title compound. Further, recrystallization from hexane gave a pure compound.
- a tablet consisting of the following composition is prepared by a conventional method.
- a capsule having the following composition is prepared by a conventional method.
- the pyrazo opening thiazolopyrimidine derivative useful as an anti-inflammatory agent, an immunomodulator, and an anti-ulcer agent can be provided.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ES92924885T ES2149180T3 (es) | 1991-12-10 | 1992-12-07 | Derivado de pirazolotiazolopirimidina. |
| US08/094,106 US5527908A (en) | 1991-12-10 | 1992-12-07 | Pyrazolothiazolopyrimidine derivatives |
| DE69231244T DE69231244T2 (de) | 1991-12-10 | 1992-12-07 | Pyrazolothiazolopyrimidin-derivate |
| AT92924885T ATE194621T1 (de) | 1991-12-10 | 1992-12-07 | Pyrazolothiazolopyrimidin-derivate |
| EP92924885A EP0573659B1 (en) | 1991-12-10 | 1992-12-07 | Pyrazolothiazolopyrimidine derivative |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3/326177 | 1991-12-10 | ||
| JP32617791 | 1991-12-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1993012120A1 true WO1993012120A1 (fr) | 1993-06-24 |
Family
ID=18184905
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP1992/001595 Ceased WO1993012120A1 (fr) | 1991-12-10 | 1992-12-07 | Derive de pyrazolothiazolopyrimidine |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US5527908A (ja) |
| EP (1) | EP0573659B1 (ja) |
| AT (1) | ATE194621T1 (ja) |
| CA (1) | CA2103678A1 (ja) |
| DE (1) | DE69231244T2 (ja) |
| ES (1) | ES2149180T3 (ja) |
| WO (1) | WO1993012120A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998043982A1 (en) * | 1997-04-02 | 1998-10-08 | Rimma Iliinichna Ashkinazi | Tetracyclical derivatives from pyrimidine |
| RU2169732C1 (ru) * | 1997-04-02 | 2001-06-27 | Ашкинази Римма Ильинична | Производные 5-оксо-5н-[1]-бензопирано-[5,6-b]4-оксо-4н-[1,2]-пиримидо-1,4,5,6-тетрагид ро-1,3-тиазина |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2834288B1 (fr) * | 2001-12-28 | 2011-12-16 | Virbac Sa | Procede de preparation de nouveaux derives n-substitues de 5-amino-phenylpyrazole, nouveaux derives n-substitues de 5-amino-phenylpyrazole et leur utilisation comme agents parasiticides et/ou insecticides |
-
1992
- 1992-12-07 WO PCT/JP1992/001595 patent/WO1993012120A1/ja not_active Ceased
- 1992-12-07 US US08/094,106 patent/US5527908A/en not_active Expired - Fee Related
- 1992-12-07 EP EP92924885A patent/EP0573659B1/en not_active Expired - Lifetime
- 1992-12-07 ES ES92924885T patent/ES2149180T3/es not_active Expired - Lifetime
- 1992-12-07 DE DE69231244T patent/DE69231244T2/de not_active Expired - Fee Related
- 1992-12-07 AT AT92924885T patent/ATE194621T1/de not_active IP Right Cessation
- 1992-12-07 CA CA002103678A patent/CA2103678A1/en not_active Abandoned
Non-Patent Citations (1)
| Title |
|---|
| Liebigs Ann. Chem. (12) (1987) SVETLIK. JAN "Synthesis of linear annulated tricyclic heterocycles incorporating the pyrazolo(3,4-d)pyrimidine skeleton", p. 1121-1122. * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998043982A1 (en) * | 1997-04-02 | 1998-10-08 | Rimma Iliinichna Ashkinazi | Tetracyclical derivatives from pyrimidine |
| US6071905A (en) * | 1997-04-02 | 2000-06-06 | Natural Drug Sciences, Llc | Biologically active substance on the basis of tetracyclic nitrogen heterocycles of pyrimidine row |
| RU2169732C1 (ru) * | 1997-04-02 | 2001-06-27 | Ашкинази Римма Ильинична | Производные 5-оксо-5н-[1]-бензопирано-[5,6-b]4-оксо-4н-[1,2]-пиримидо-1,4,5,6-тетрагид ро-1,3-тиазина |
Also Published As
| Publication number | Publication date |
|---|---|
| DE69231244T2 (de) | 2001-01-25 |
| CA2103678A1 (en) | 1993-06-11 |
| EP0573659B1 (en) | 2000-07-12 |
| EP0573659A4 (en) | 1994-09-07 |
| DE69231244D1 (de) | 2000-08-17 |
| EP0573659A1 (en) | 1993-12-15 |
| ATE194621T1 (de) | 2000-07-15 |
| ES2149180T3 (es) | 2000-11-01 |
| US5527908A (en) | 1996-06-18 |
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