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EP3846816A1 - Agents neuroprotecteurs pour le traitement de maladies neurodégénératives - Google Patents

Agents neuroprotecteurs pour le traitement de maladies neurodégénératives

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Publication number
EP3846816A1
EP3846816A1 EP19858466.6A EP19858466A EP3846816A1 EP 3846816 A1 EP3846816 A1 EP 3846816A1 EP 19858466 A EP19858466 A EP 19858466A EP 3846816 A1 EP3846816 A1 EP 3846816A1
Authority
EP
European Patent Office
Prior art keywords
alkyl
compound
optionally substituted
aryl
alkenyl
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.)
Pending
Application number
EP19858466.6A
Other languages
German (de)
English (en)
Other versions
EP3846816A4 (fr
Inventor
Aloke K. Dutta
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wayne State University
Original Assignee
Wayne State University
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US16/124,974 external-priority patent/US10874669B2/en
Priority claimed from US16/154,301 external-priority patent/US20190038622A1/en
Application filed by Wayne State University filed Critical Wayne State University
Publication of EP3846816A1 publication Critical patent/EP3846816A1/fr
Publication of EP3846816A4 publication Critical patent/EP3846816A4/fr
Pending legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/13—Amines
    • A61K31/135—Amines having aromatic rings, e.g. ketamine, nortriptyline
    • A61K31/137—Arylalkylamines, e.g. amphetamine, epinephrine, salbutamol, ephedrine or methadone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/41—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having five-membered rings with two or more ring hetero atoms, at least one of which being nitrogen, e.g. tetrazole
    • A61K31/4164—1,3-Diazoles
    • A61K31/4184—1,3-Diazoles condensed with carbocyclic rings, e.g. benzimidazoles
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
    • A61K31/496—Non-condensed piperazines containing further heterocyclic rings, e.g. rifampin, thiothixene or sparfloxacin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/14—Drugs for disorders of the nervous system for treating abnormal movements, e.g. chorea, dyskinesia
    • A61P25/16—Anti-Parkinson drugs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P25/00—Drugs for disorders of the nervous system
    • A61P25/28—Drugs for disorders of the nervous system for treating neurodegenerative disorders of the central nervous system, e.g. nootropic agents, cognition enhancers, drugs for treating Alzheimer's disease or other forms of dementia

Definitions

  • the present invention relates to compounds for treating neurodegenerative diseases.
  • Dopaminergic receptor systems have been targeted for the development of pharmaeotherapeulic agents for a number of CNS related disorders, including drug addiction, schizophrenia, depression, and Parkinson’s disease (PD).
  • Dopamine (DA) receptor agonists have been employed more extensively in the treatment of Parkinson’s disease than any other type of pharmacotherapy.
  • Levodopa L-dopa
  • DA receptors belong to the family of transmembrane proteins known as G-protein-coupled receptors (GPCRs). DA receptors are widely distributed in the CNS, are also present in the periphery, and are divided into five subtypes.
  • Dl and D5 are grouped together as Dl type.
  • D2-D4 receptors are classified as D2 type because of their inhibitory action on adeny!yl cyclase activity.
  • the D3 receptor was found to have a distribution in the brain that is somewhat different from that of the D2 receptor. The highest levels of D3 receptor expression were found to be in the limbic region of the brain, while D2 receptor expression is most dense i n the striatum of the midbrain.
  • D2 and D3 receptor subtypes occur post- and presynapiically. In the latter location they function as autoreceptors that regulate DA synthesis, metabolism, and release. It is noteworthy that D2 and D3
  • I receptor subtypes share 50% overall amino acid sequence homology and 75-80% in their agonist binding sites. As a result, development of ligands selective for either subtype is a challenging task.
  • Parkinson’s disease is a progressive, neurodegenerative disorder that results from the death of DA-producmg cells in the substantia nigra region of the midbrain.
  • Common symptoms include resting tremor, muscular rigidity, bradykinesia, postural instability, and cognitive psychiatric complications.
  • oxidative stress and mitochondrial dysfunction are thought to play a central role in the pathology of the disease.
  • Oxidative stress has been strongly implicated in midbrain dopaminergic cell death.
  • a-syrmciein a presynaptic protein involved in fibril lization, has been implicated in the pathogenesis of PD.
  • an interaction between calcium, cytosolic DA, and a-synuclein has been implicated in the loss of DA neurons in the substantia nigra.
  • DAdependent neurotoxicity is mediated by a soluble protein complex containing a-synuclein, Therefore, a-synuclein, together with oxidized DA, could have synergistic effects in terms of disease susceptibility an progression.
  • the present: invention solves one or more problems of the prior art by providing a compound having formula ⁇ for treating a neurodegenerative disease:
  • R] is H, Ci-s alkyl, C 2 -s alkenyl, C 4 -s cydoaikyl, CU-s cycioalkenyi, Ce-io aryl, Ci -to alky!
  • R 2 , R J , R 4 , Rs are each independently H or OH wherein at least 2 of R 2 , R 3 , R 4 , Rs are OH;
  • Re is an optionally substituted Ci-s alkyl, Ci-s alkoxyl, C 2 -s alkenyl, C 2-8 alkynyl, Ci-s
  • R ? is an optionally substituted Ci-s alkyl. Cos alkoxyl, C 2-3 alkenyl, C 2-8 alkynyl. Ci-s cydoaikyl, Ci-s cydoalkenyi, or C 0-10 aryl;
  • R are each independently hydroxyl, CM alkyl, C alkoxyl. C alkyl, C 2-8 alkenyl. C 2-8 alkynyl, Ci-s cydoaikyl, Ci-s cycloalkenyl; C MO aryl, ⁇ NR or Cwo hydrocarbon groups optionally containing one or more G, N, S, or Se heteroatoms where R’ individually are H or organ yi groups (e,g., C alkyl, Cz-s alkenyl, C 2 -s alkynyl, Ci-s cydoaikyl, Ci-s cycloalkenyl, or Ce-io aryl) and q is 2 or 3. with the proviso that when q is 3, the group bears a positive formal charge (with an appropriate counter ion (e.g,, halide) being present);
  • Z m is absent or a divalent linking moiety in which Z is repeated m times;
  • 0 is 0, 1, 2, 3, or 4;
  • a compound having formula P for treating a neurodegenerative disease is provided:
  • A is an optionally substituted CV12 aryl or Ce-i2 heteroaryl
  • o 0, 1 , 2. 3, or 4;
  • Ru is an optional substituent.
  • FIGURE 1 Synthetic Scheme 1 for compounds that are useful for treating a neurodegenerati ve disease.
  • FIGURES 2A-B (A) Inhibition of aSN fibriliizaiion by D-687 and D-688 The drugs were incubated with aSN over a period of six days and the fibrilizaiioti was measured by ThT fluorescence assay. Data Values shown are means ⁇ SEMs of three independent experiments. (B) PCI 2 cells were treated w ith 10 mM prefabricated aSN aggregates formed in presence of daigs collected at day 0 and day 6. Values shown are means ⁇ SEMs of three independent experiments performed in 4-6 replicates. One way ANOVA analysis followed by Tukey's Multiple Comparison post hoc test were performed. (*p ⁇ 0,01 compared to the control),
  • FIGURES 3 A and 38 Inhibition and dissociation of Abi-42 oligomer formation by : a) ThT fluorescence of Abi-4 (IOmM ) with or without incubation w ith test compounds (20mM) for 24 h. The ThT fluorescence of Abi-42 at Oh was taken as 100%. b) Abi-42 fibrils ( ⁇ OmM) w'ere incubated with test compounds (20mM) for a period of 24h. The ThT fluorescence of Abi- « aggregates at Oh was considered as 100%
  • FIGURE 4 Synthetic Scheme 2 for compounds that are useful for treating a neurodegenerative disease
  • FIGURE 6 Synthetic Scheme 4 for compounds that are useful for treating a neurodegenerati ve disease.
  • R where i is an integer) include hydrogen, alkyl, lower alkyl, C alkyl, CVJO aryl, CV K > heteroaryl, -N ⁇ 1 ⁇ 4, -NH>, -N(R’R”), -N(R’R M R M, ) ⁇ L-, Cl, F, Br, -CFj, -CCb, -CN, - SO H, -PO 3 H 2 , -COOH, -COsR’, -CORE -CBO, -OH, -OR’, -0/NG, -SOyAT, -POyM ⁇ -COO NT, - CF 2 H, -CFiRk -CF3 ⁇ 4, and -CFR’R” where R R” and R”’ are Ci-io alkyl or Ce-is aryl groups (it should he appreciated that these groups can be in addition to other groups listed for a specific R groiup); single letters (e.g., "n
  • concentrations, temperature, and reaction conditions e.g., pressure, pH, etc.
  • concentrations, temperature, and reactio conditions e.g., pH, etc.
  • concentrations, temperature, and reactio conditions can be practiced with pins or minus 10 percent of the values indicated rounded to three significant figures of the value provided in the examples.
  • concentrations, temperature, and reaction conditions e.g,, pressure, pH, flow rates, etc.
  • concentrations, temperature, and reaction conditions can be practiced with plus or minus 50 percent of the values indicated rounded to or truncated to two significant figures of the value provide in the examples
  • concentrations, temperature, and reaction conditions e.g, pressure, pH, How rates, etc.
  • concentrations, temperature, and reaction conditions can be practiced with plus or minus 30 percent of the values indicate rounded to or truncated to two significant figures of the value provided in the examples.
  • concentrations, temperature, and reaction conditions e.g., pressure, pH, flow rates, etc.
  • concentrations, temperature, and reaction conditions can be practiced with plus or minus 10 percent of the values indicated rounded to or truncated to two significant figures of the value provided in the examples,
  • organyl group means any organic substituent group, regardless of functional type, having one free valence at a carbon atom.
  • organyl group include but are not limited to Ci-s alkyl, C2-8 alkenyl, C2-8 alkynyi, C4-8 cycloalkyl, C4-8 cycloalkenyl, G no aryl, C2-10 aikanediyl, Ci-s alkoxy, Cue thioalkoxy, Cs-is cylcoalkyl, and the like. More specific examples Inc hides, but are not limited to methyl, ethyl, propyl, butyl, pyridinyi , 4-pyridylmeihyl, and the like,
  • alkyl means a straight or branched hydrocarbon radical having from 1 to 10 carbon atoms and includes, for example, methyl, ethyl, n -propyl, isopropyl, n-butyi, sec-butyl, isobutyl, tert-butyl, n-pentyl, n ⁇ hexy1, n-heptyl, n-octyl, and the like.
  • alkanediyl means a straight or branched hydrocarbo diradical having from 1 to 10 carbon atoms formed by removing 2 hydrogen atoms from an alkane
  • alkenyl means a straight or branched unsaturated hydrocarbon radical having from 2 to 12 carbon atoms and includes, for example, ethenyl, 2-propenyl, 1 -bnteny!, 2-butenyl, l-pcntenyl, 2-pen Lenyl, 3-rnethyl-3-butenyl, 1-hexenyi, 2 ⁇ hexenyi, 3-hcxcnyS, 3-heptenyl,
  • alkynyl means straight or branched triple bonded unsaturated hydrocarbon radical having from 2 to 12 carbon atoms and includes, for example, ethynyl, 2- propynyl, 3 ⁇ butynyl, 4-penlynyl, 5-hexynyl, 6-hcptynyl, 7-octynyl, 8-nonynyi, 9-decynyl, 10- undecynyl, l l-dodecynyl, and the like.
  • alkynediyl means a straight or branched hydrocarbon diradical having from 2 to 12 carbon atoms formed by removing 2 hydrogen atoms fro a €2-12 alkyne.
  • heterocycloa!ky means a saturated hydrocarbon ring having 3 to 8 carbon atoms in which 1 or more carbon atoms are replaced by N, S, O, Se, etc. Examples includes
  • aryl means an aromatic radical such as a phenyl group, a naphthyl group, a phenyl group substituted by 1 to 4 substituents selected from alkyl as defined above, alkoxy as defined above, ihioalkoxy as defined above, hydroxy, halogen, ieriluoro methyl, amino, a!ky!amino as defined above for alkyl, dia!ky!amino as defined for alkyl, N -acetyl amino, cyano— SO2NH2, or nitro, or a naphthyl group substituted by 1 to 4 substituents as defined above for a phenyl group substituted by 1 to 4 substituents, in a refinement, aryl is a Q.- ai l .
  • the term w heteroary!” means a C5-13 heteroaromatic radical such as 2- or 3- thienyl; 2 ⁇ or 3-furanyl; 1 -, 2- or 3-pyrrolyi; 1 ⁇ , 2-, 4 ⁇ , or 5-imidazoIyi; 1 ⁇ , 3-, 4 ⁇ , or 5-pyrazolyS; 2-, 4-, or 5 ⁇ thiazoiyi; 3-, 4-, or S-isothiazol l; 2 ⁇ , 4 ⁇ , or 5-oxazolyS; 3 ⁇ 4-, or 5-isoxazolyl; 1 ⁇ , 3-, or 5-
  • heieroaryl is a C5.10 heteroaryl.
  • BINAP means 2,2'-bis(diphenylphosphino)-l ,G-binaphthyl
  • DMSO dimethylsulfoxide
  • DA dopamine
  • NaBH(OAc) 3 means sodium triacetoxyborohydride.
  • Pd(OAc)2 means pailadium(II) acetate.
  • SCh.py means sulfur trioxide pyridine.
  • Ft is room temperature
  • TBAF is tetra-ti-buiyiammonium fltoride
  • TBS means iert-buty 1 dimethyl si! y 1.
  • the present invention provides a compound having formula 1 for treating a neurodegenerative disease:
  • Ri is H, C * i 8 alkyl C 2 -8 alkenyl, C 4 -s cycloalkyl C4-& cycloalkenyl, C ⁇ cio aryl, C’w « alkyl
  • R is H, an optionally substituted Ci ⁇ alkyl, an optionally substituted Cue a!koxyl, an optionally substituted C . alkenyl, an optionally substituted C;vs alkynyl, an optionally substituted C 4-8 cycloaikyi, an optionally substituted C 4-8 cycloalkenyl, an optionall substituted Qcio aryl.
  • I I R? is H, an optionally substituted C M alkyl, an optionally substituted Cos alkoxyi, an optionally substituted C 2-8 alkenyl, an optionally substituted C 2-8 alkynyl, an optionally substituted C M cycloalkyl, an optionally substituted C 4-8 eycloalkenyi, or an optionally substituted Cs-io aryl;
  • Rg are each independently hydroxyl, C M alkyl, C M alkoxyi, C M alkyl, C2-8 alkenyl, C2-8 alkynyl, C M cycloalkyl, CM eycloalkenyi; C MO aryl, -NR 3 q or CM O hydrocarbon groups optionally containing one or more O, N, S, or Se heteroatoms where R 3 individually are H or organ yl groups and q is 2 or 3, with the proviso that when q is 3, the group bears a positive formal charge; and
  • Z m is absent or a divalent linking moiety in which Z is repeated m times;
  • o is 0, 1 , 2, 3, or 4 (when o is 0 all substituents are hydrogen (H));and
  • n is an integer from 0 to 5.
  • R ⁇ ; and R are each independently CM alkyl, C alkenyl, CM alkynyl, CM cycloalkyl, or C eycloalkenyi.
  • Ry is H, C alkyl, C M alkenyl, C cycloalkyl, CM cycloalkenyl, or Ce-io aryl;
  • r is 2 or 3;
  • Ar is a M 0 aryl ring system, optionally including one or more lieteroatoms or Cs-io heteroaryl; with the proviso that when r is 3, the nitrogen of the N(R9) f group will bear a positive formal charge hi a further refinement, Ar is an optionally substituted phenyl, thienyl, pyridy!, bipyridyk biphenylyi, or naphthyl.
  • Rs are hydroxyl, C M alkyl, C M alkoxyi, C M alkenyl, C2-8 alkynyl,
  • CM eycloalkenyi or C ft -io aryl where q is 2 or 3, with the proviso that when q is 3, the group bears a positive formal charge and wherein the hydrocarbon groups in each case are optionally substituted with -CN, CM alkyl, -ORu, -OH, halo, or -CF3 ⁇ 4 where R e, is CM alkyl.
  • Z can be -CH.>-, -CHOHCH2-, -CHOHCH2CH2-, -CHOHCH2CH2CH2-, -CO-,
  • Ci-io carboximido Ci-io alkanediyl, C 2 -io alkanediyl, €2-10 alkynediyl, and combinations thereof; m is 1 , 2, 3, 4, or 5, and n and k are each independently integers 0, 1, 2, 3, 4, 5 ,6, 7, or 8
  • a compound having formula P for treating a neurodegenerative disease is provided:
  • A is an optionally substituted CM 2 aryl or Ce-i2 heteroaryl
  • Ri4 are each independently H, Ci s alkyl, C2-S alkenyl, C 4 -s eycloalkyl, C 4 -s cycloalkenyl, C f t-to aryl, Ci-io alkyl, or CMO and;
  • o 0, 1 , 2, 3, or 4;
  • R u is an optional substituent as set forth above for example of R group substituents. (0067] in a variation of the compounds having formula 11.
  • A is optionally substituted phenyl:
  • Ri?, Ris, Riv, R 20 are each independently H, Cos alkyl, OH, or halide (e.g,, F, Ci, Br, 1) or any R group substituent set forth above.
  • A is a substituted phenyl having 1, 2, 3, or 4 hydroxyl groups.
  • A is:
  • R ⁇ . « ⁇ > are H, hydroxyl, halogen, nitro, cyano, Cj-s alkyl, Cue alkoxyl, C 2 - s alkenyl, C2-8 alkynyl, C4-8 cycloalkyl, C4-8 cycloalkenyl; Ce-to aryl, -N(Rn) q -NH-C(0)-Ru, or - NH- €(0)-N(RI2)2, where Rn individually are H, Ci-& alkyl, C2-8 alkenyl, € 2-10 alkynyl, C 4 -8 cycloalkyl, C 4-8 cycloalkenyl, or C- 6 -io aryl where q is 2 or 3, with the proviso that when q is 3, the group bears a positive formal charge and wherein the hydrocarbon groups in each case are optionally substituted with -CN, Ci-s alkyl, -ORr > , -
  • the compounds set forth herein may be used per se or as pharmaceutically accepta derivatives.
  • the latter term includes salts, esters, and other derivatives generally considered acceptable by pharmaceutical standards.
  • Useful derivatives include salts of organic and inorganic acids such as sulfates, phosphates, hydrohalide salts, carboxylaie salts, etc., as well as esters of carboxylic acid or hydroxyl substituents, ethers of hydroxyl substituents, amides of amino substituents, as well as carbamates, ureas, etc. Synthesis of these derivatives is conventional, and well known to those skilled in pharmaceutical chemistry.
  • esters may he converted to esters by customary techniques of organic chemistry, such as reaction with an acyl halide, carboxylic acid anhydride, or by esterification with an acid while removing byproduct water.
  • derivation may be desired to facilitate compounding of the pharmaceutical into an acceptable form such as tablets, powder, aqueous dispersion, capsule, etc , or may be useful in assi sting bioavailability of the drug following administration, for example, by rendering the compound more or less soluble.
  • esters, ureas such as, for example, esters, ureas
  • a method for treating a subject with a neurodegenerative disease in another embodiment, a method for treating a subject with a neurodegenerative disease.
  • the method includes a step of identifying a subject having a CMS disease.
  • a therapeutic amount of a compound having formula 1 or 11 or any of the variation or refinements thereof is administered to the subject.
  • neurodegenerative diseases includes drug addiction, schizophrenia, depression, and Parkinson; s disease (PD).
  • PD s disease
  • Typical dosages for mammalian subjects may vary from 0.001 mg Kg of body weight to about 100 mg Kg of body weight, preferably 0.01 nig-Kg to 5 mg/Kg Tire actual amount will vary depending upon the particular CNS activity desired to be altered, and the desired degree of alteration. The upper limits may, as with virtually ail drugs, be limited by toxicity of the drug or its metabolites, or by the presence of unwanted side effects.
  • the drugs may be administered in any form, but preferably in the form of tablets or capsules with appropriate excipients. Dosages, forms of administration, etc., can be readily determined by those skilled in the art.
  • Figure 1 provides a synthetic scheme for compounds having formula I.
  • Figure 2 provides (A) inhibition of aSN tibrillization by D-687 and D-688. The drugs were incubated with aSN over a period of six days and the fibrilization was measured by ThT fluorescence assay. Data Values shown are means ⁇ SEMs of three independent experiments, (B) PC 12 cells were treated with 10 mM prefabricated aSN aggregates formed in presence of drugs collected at day 0 and day 6. Values shown are means ⁇ SEMs of three independent experiments performed in 4-6 replicates. One way ANOVA analysis followed by Tukey's Multiple Comparison post hoc test were performed. (*p ⁇ 0.0l compared to the control).
  • L4-Bis(chloromethyl)-2,5-dimethoxybenzene (2) Paraformaldehyde (3.3 g, 108,6 mmol) was added to a slurry of compoun 1 (5.0 g, 36,2 mmol) in cone HC1 (15 mL) and acetic acid (15 mL) at rt under inert gas atmosphere. The mixture was sonicated for 2h, Hie mixture was filtered and the solid w3 ⁇ 4s washed with hexane (3 X 50 mL) followed by acetone (15 mL).
  • reaction mixture was stirred at 50 °C for !h. Temperature was increased to 85 °C and the reaction mixture was allowed to stir at that temperature for additional 5 minutes. The mixture was cooled to rt. The reaction mixture was diluted with water (100 ml.) and extracted with ethyl acetate (3 X 150 mL). The combined organic layer was washed with water, brine, dried over NajSOi, and solvent was removed under vacuum.
  • Reaction temperature was raised to 55 °C and the mixture was stirred for 4 h, Alter cooling, water (1 mL) and concentrated HC1 (2 mL) were added at 0 °C and then THF was evaporated under vacuum. 25% NaOH solution (20 mL) was added to the aqueous phase and extracted with EtOAc (3 x 25 mL). The combined organic layer was dried using NaaSCU, and the solvent was removed under reduced pressure.

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Abstract

L'invention concerne un composé répondant à la formule I qui est utile pour traiter une maladie neurodégénérative : (I) ou un sel ou ester pharmaceutiquement acceptable de celui-ci, dans laquelle R1, R2, R3, R4, R5, R6, R7, R8 représentent chacun indépendamment un groupe hydroxyle, alkyle en C1-4, alcoxy en C1-4, alkyle en C1-8, alcényle en C2-8, un groupe alcynyle en C2-8, C4-8 et sont des substituants spécifiés.
EP19858466.6A 2018-09-07 2019-09-06 Agents neuroprotecteurs pour le traitement de maladies neurodégénératives Pending EP3846816A4 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US16/124,974 US10874669B2 (en) 2012-11-29 2018-09-07 Neuroprotective agents for treatment of neurodegenerative diseases
US16/154,301 US20190038622A1 (en) 2012-11-29 2018-10-08 Neuroprotective agents for treatment of neurodegenerative diseases
PCT/US2019/049927 WO2020051435A1 (fr) 2018-09-07 2019-09-06 Agents neuroprotecteurs pour le traitement de maladies neurodégénératives

Publications (2)

Publication Number Publication Date
EP3846816A1 true EP3846816A1 (fr) 2021-07-14
EP3846816A4 EP3846816A4 (fr) 2022-08-17

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CN115724758B (zh) * 2021-08-24 2024-12-27 杭州中美华东制药有限公司 喜树碱衍生物中间体及其合成方法和利用中间体合成喜树碱衍生物的方法

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EP2925755B1 (fr) * 2012-11-29 2021-09-08 Wayne State University Agents neuroprotecteurs pour le traitement de maladies neurodégénératives

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