EP3802547A1 - Procede de fabrication de composes comprenant un groupe fonctionnel oxazolopyridinones - Google Patents
Procede de fabrication de composes comprenant un groupe fonctionnel oxazolopyridinonesInfo
- Publication number
- EP3802547A1 EP3802547A1 EP19728382.3A EP19728382A EP3802547A1 EP 3802547 A1 EP3802547 A1 EP 3802547A1 EP 19728382 A EP19728382 A EP 19728382A EP 3802547 A1 EP3802547 A1 EP 3802547A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- group
- compound
- alkyl
- formula
- aryl
- 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- Withdrawn
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D498/00—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
- C07D498/02—Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
- C07D498/04—Ortho-condensed systems
Definitions
- the present invention relates to a process for the manufacture of compounds comprising an oxazolopyridinone group.
- the present invention thus relates to a process for the manufacture of compounds comprising an oxazoiopyridinone group of formula (3) which is optionally substituted:
- triphosgene which is a safer substitute for phosgene.
- triphosgene remains a toxic product because it decomposes into phosgene by heating or by reaction with a nucleophile. In such a way that it is necessary to take the same safety precautions to involve triphosgene as phosgene.
- Triphosgene is a solid and by its nature requires the addition of solvent that can contaminate the finished product and therefore requires one or more additional purification steps to remove any trace of these toxic contaminants.
- the process requires the dissolution of a chlorine and fluorine-substituted amino alcohol derivative in an aprotic solvent such as tetrahydrofuran (THF) and the presence of a base such as that l, 8-diazabicyclo [5.4.0] undec-7-ene (DBU) which deprotonates the molecule and makes it more nucleophilic therefore more able to react with the carbonyl donor.
- an aprotic solvent such as tetrahydrofuran (THF) and the presence of a base such as that l, 8-diazabicyclo [5.4.0] undec-7-ene (DBU) which deprotonates the molecule and makes it more nucleophilic therefore more able to react with the carbonyl donor.
- DBU 8-diazabicyclo [5.4.0] undec-7-ene
- the aim of the invention is to solve the aforementioned problems by providing a process for producing compounds comprising an optionally substituted oxazolopyridinone group of formula (3):
- Diaryl carbonates are on the one hand much cleaner, less toxic to the environment and health and on the other hand requiring neither solvent nor base.
- the compound comprising an optionally substituted ortho-aminohydroxypyridine group is in a solid state when the compound comprising an optionally substituted diarylcarbonate group is in a molten state. There is thus formed a suspension of the compound comprising an optionally substituted ortho-aminohydroxypyridine group in the compound comprising an optionally substituted diarylcarbonate group, thus avoiding the contamination of the reaction medium with compounds that will have to be removed later.
- the process according to the present invention is therefore cleaner, less expensive and particularly flexible and intricateiisable, the use of phosgene or triphosgene which are complicated products to handle and toxic is not necessary. It also makes it possible to dispense with 1,1'-carbonyldiimidazole which has a high cost and which is therefore difficult to adapt industrially.
- the method according to the present invention uses an optionally substituted diarylcarbonate which is a cheap reagent, even for molecules whose cyclization is difficult to implement by their nature less nucleophilic.
- the term "compound comprising a diarylcarbonate group” means carbonate esters comprising diaryl carbonates, that is to say carbonates having two Arl aryl substituents in which Ar 1 represents an aryl group such as for example a phenyl group, a tolyl group, a xylyl group, a mesityl group, a naphthyl group, more particularly Arl represents a phenyl group.
- the method further comprises:
- the method re:
- said heating step takes place between 1 h and 24 h.
- the process according to the present invention is characterized in that said heating step takes place for at least 1 h, advantageously at least 2h, in particular at least 3h, preferably at least 4h, advantageously at least 5h, preferably at least 6h, in particular at least 7h, preferably at least 8h, advantageously at least 9h, in particular at least lOh, preferably at least 11h, advantageously at least 12b, preferably at least 13h, in particular at least 14h, preferably at least 15h, advantageously at least 16h, in particular at least 17h, preferably at least 18h, advantageously at least 19h, preferably at least 20h, in particular at least 21b, preferably at least 22h, advantageously at least 23h, preferably at most 24h, advantageously at most 23h, in particular at most 22h, preferably at most 21h, advantageously at most 20h, preferably at most 19h, in particular at least at least
- the process is characterized in that said compound comprising an ortho-aminohydroxypyridine group of formula (1) is 2-amino-3-hydroxypyridine or 3-amino-4-hydroxypyridine or 4-amino-3-hydroxypyridine or 3-amino-2-hydroxypyridine.
- said compound comprising an ortho-aminohydroxypyridine group of formula (1) may be substituted on the pyridine ring respectively by one or more substituents chosen independently of each other from the group consisting of R, ORi, SRi and NR2R3 radicals. , NR4R5, C (O) R 6 and SO 2 R 7 where: R represents independently a hydrogen atom or an alkyl, aryl, halogen or nitro group,
- R 1 independently represents an alkyl, aryl or C (O) R 2 group ,
- R 2 independently represents an alkyl or aryl group
- R 3 independently represents an alkyl or aryl group
- R 4 represents a group C (O) R 2 ,
- R 5 independently represents a hydrogen atom or an alkyl or aryl group
- R 6 independently represents a hydrogen atom or an alkyl, aryl, O 2 or NR 2 R 3 group ,
- R 7 independently represents an alkyl, aryl, NH 2 or NR 4 R 5 group.
- the process is characterized in that said compound comprising an ortho-aminohydroxypyridine group of formula (1) may be substituted on the amino group by an alkyl group.
- the process is characterized in that said compound comprising an oxazolopyridinone group of formula (3) may subsequently be substituted on the pyridine ring by one or more substituents chosen independently of one another in the group consisting of R, OR 1, SR 1, NR 2 R 3 , NR 4 R 5 , C (O) Re and SO 2 R 7 O ⁇ :
- R represents independently a hydrogen atom or an alkyl, aryl, halogen or nitro group
- R 1 independently represents an alkyl, aryl or C (O) R 2 group
- R 2 independently represents an alkyl or aryl group
- R 4 represents a group C (O) R 2 ,
- R 5 independently represents a hydrogen atom or an alkyl or aryl group
- R 6 independently represents a hydrogen atom or an alkyl, aryl, OR 2 or NR 2 R 3 group,
- R 7 independently represents an alkyl, aryl, NH 2 or NR 4 R 5 group
- the process is characterized in that the said compound comprising an oxazolopyridinone group of formula (3) may subsequently be substituted on the oxazolidinone ring at the 3-position, respectively, with one or more substituents chosen independently of one another in the group consisting of the radical R 'where R' independently represents:
- the method is characterized in that said compound comprising a diarylcarbonate group of formula (2) comprises at least one phenyl group, preferably two phenyl groups.
- the invention also relates to the use of said compound prepared according to the present invention, for the preparation of Azamethiphos.
- Azamethiphos is a molecule known to be insecticidal by acting on the nervous system of flying and crawling insects and animal parasites.
- the invention relates to the use of said compound prepared according to the present invention for the preparation of analogues of osmidomycin.
- Fosmidomycin is known to be a herbicide but also as an antibiotic involved in the treatment of Malaria / Malaria.
- the invention also relates to the use of said compound prepared according to the present invention for the preparation of analogs of 3- [(4-aryl-1-piperazinyl) alkyl] oxazolo [4,5-b] pyridin-2- (3H) -one or 1 - [(4-aryl-1-piperazinyl) alkyl] oxazolo [5,4-b] pyridin-2- (1H) -one or N-aminohydroxypyridine compounds -substituted.
- analogous compounds of 3 - [(4-aryl-1-piperazinyl) alkyl] oxazolo [4,5-b] pyridin-2- (3H) -one, 1 - [(4-aryl) 1-piperazinyl) alkyl] oxazolo [5,4-b] pyridin-2- (1H) -one or the N-substituted aminohydroxypyridine compounds act as analgesic compounds.
- the process according to the present invention is characterized in that it further comprises a second aromatic chlorination reaction step of said first compound comprising an oxazolopyridinone group to form a second compound comprising an oxazolopyridinone group.
- said second aromatic chlorination reaction step is carried out in an aprotic polar solvent selected from the group consisting of acetone, acetonitrile, DM F, THF, NMP and ethyl acetate, with chlorine gas cold to form said second compound comprising an oxazolopyridinone moiety.
- the process according to the present invention is characterized in that it further comprises a third reaction step of said second compound comprising an oxazolopyridinone group with paraformaldehyde to form a third compound comprising an oxazolopyridinone group.
- the process according to the present invention is characterized in that it comprises, in addition, a fourth reaction step of said third compound comprising an oxazolopyridinone group with thionyl chloride to form a fourth compound comprising an oxazolopyridinone group, of preferably said fourth compound comprising an oxazolopyridinone functional group is 6-chloro-3- (chloromethyl) oxazolo [4,5-b] pyridine-2 (3H) -one.
- the process according to the present invention is characterized in that it further comprises a step of isolating said fourth compound comprising an oxazolopyridinone group, preferably by precipitation with water, which also makes it possible to isolate the product in order to increase its purity.
- the process is characterized in that it further comprises a fifth reaction step of said fourth compound comprising an oxazolopyridinone moiety with sodium O, O'-dimethylphosphorothioate in a solvent. , preferably a polar solvent to form a fifth compound comprising an oxazolopyridinone group, such as Azamethiphos.
- the process according to the present invention is characterized in that it further comprises a step of precipitating and purifying said fifth compound comprising an oxazolopyridinone group, preferably by recrystallization, which also makes it possible to purify the product in the process. purpose of increasing its purity.
- the process according to the present invention is characterized in that it further comprises at least one chromatographic monitoring step, preferably after each reaction step.
- the invention also relates to the use of said compound prepared according to the present invention, for the preparation of a medicament or an effective treatment for treating autoimmune diseases, melanoma, arthritis, rheumatoid arthritis, Parkinson's disease, asthma, dementia, Alzheimer's disease, leukemia, diabetes, psoriasis, heart failure and allergies.
- Reaction I is a direct reaction according to the process of the present invention between a compound comprising an ortho group aminohydroxypyridine of formula (1) optionally substituted and, a compound comprising a diarylcarbonate group of formula (2) optionally substituted to form a first compound of formula (3) optionally substituted comprising an oxazolopyridinone group and a compound comprising a phenol group of formula (4) ) as described above
- the compound comprising an ortho-aminohydroxypyridine group of formula (1) may be substituted on the pyridine ring by one or more substituents chosen independently of each other from the group consisting of R, ORi, SRi, R2R3, NR 4 radicals. R 5 , C (O) R 6 and SO 2 R 7 where
- R represents independently a hydrogen atom or an alkyl, aryl, halogen or nitro group
- R 1 independently represents an alkyl, aryl or C (O) R 2 group ,
- R 2 independently represents an alkyl or aryl group
- R3 independently represents an alkyl or aryl group
- R 4 represents a group C (O) R 2 ,
- R5 independently represents a hydrogen atom or an alkyl or aryl group
- R 6 independently represents a hydrogen atom or an alkyl, aryl, OR 2 or IMR 2 R 3 group,
- R7 independently represents an alkyl, aryl, NH 2 or NR4R5 group ⁇
- the compound comprising an ortho-aminohydroxypyridine group of formula (1) may be substituted on the amino group by radical R 'where R' represents an alkyl group.
- the first compound comprising an oxazolopyridinone group of formula (3) may subsequently be substituted on the pyridine ring by one or more substituents chosen independently of each other from the group consisting of the radicals R, ORi, SRi, NR2R3, R4R5, C (O) R6 and SO2R7 where:
- R represents independently a hydrogen atom or an alkyl, aryl, halogen or nitro group
- R 1 independently represents an alkyl, aryl or C (O) R 2 group ,
- R 2 independently represents an alkyl or aryl group
- R 3 independently represents an alkyl or aryl group
- R 4 represents a group C (O) R 2 ,
- R 5 independently represents a hydrogen atom or an alkyl or aryl group
- Re independently represents a hydrogen atom or an alkyl, aryl, OR 2 or NR 2 R 3 group ,
- R7 is independently alkyl, aryl, IMH2 or NR 4 R 5.
- the first compound comprising an oxazolopyridinone group of formula (3) may subsequently be substituted on the oxazolidinone ring at the 3-position, respectively, with one or more substituents chosen independently of each other from the group consisting of the radical R 'where R 'represents independently:
- alkyl group A halomethyl group with the halogen chosen from chlorine (Cl) or bromine (Br),
- the compound comprising an ortho-aminohydroxypyridine functional group of formula (1) is 2-amino-3-hydroxypyridine or 3-amino-4-hydroxypyridine or 4-amino-3-hydroxypyridine or 3-amino-2-hydroxypyridine .
- the compound comprising a diarylcarbonate functional group of formula (2) comprises at least one phenyl group, preferably two phenyl groups.
- Example 1 Preparation of Azamethiphos
- the compound comprising an ortho-aminohydroxypyridine group of formula (1) in which the substituent R is a hydrogen atom and the substituent R 'is a hydrogen atom, in a solid state and the compound comprising a diarylcarbonate group of formula (2) in which the Arl groups are phenyl groups in a solid state will be heated to at least 85 ° C with a step of mixing the compound comprising an ortho-aminohydroxypyridine group of formula (1) a solid state in said compound comprising a diarylcarbonate group of formula (2) in a molten state to form a first compound of formula (3) comprising an oxazolopyridinone group in which the substituent R is a hydrogen atom and the R 'substituent is a hydrogen atom, and phenol of formula (4) as described below:
- oxazolopyridinone can be reacted according to the aromatic chlorination reaction II in a protic polar solvent selected from the group consisting of acetone, acetonitrile, DMF, THF, NMP and ethyl acetate, with chlorine gas cold to form a second compound of formula (5) comprising an oxazolopyridinone group as described below:
- the second compound of formula (5) comprising an oxazolopyridinone group may react with paraformaldehyde according to reaction III to form a third compound of formula (6) comprising an oxazolopyridinone functional group as described below:
- oxazolopyridinone group may react with thionyl chloride with increasing temperature according to reaction IV to form a fourth compound of formula (7) comprising an oxazolopyridinone group as described below:
- Reaction II, Reaction III and Reaction IV may be carried out in a single reactor without isolation of intermediates, namely, the second compound of formula (5) comprising an oxazolopyridinone group and the third compound of formula (6) comprising a group oxazolopyridinone or carried out sequentially in separate reactors, after isolation of the intermediates.
- the fourth compound of formula (7) comprising a moietyoxazolopyridinone is isolated by precipitation with water and can react with sodium O, O'-dimethylphosphorothioate in a polar solvent selected for example from the group consisting of primary aliphatic ketones such as acetone, methylethyl ketone, alkanols such as methanol, ethanol, isopropanol, esters such as ethyl acetate, nitriles, N-alkylated amide acids, cold according to a reaction V to form a fifth compound of formula (8) comprising an oxazolopyridinone group, Azamethiphos (8) as described below:
- Example 2 Preparation of Oxazolopyridinone Compounds (US3929809)
- the first compound of formula (3) comprising an oxazolopyridinone group may be reacted according to the halogenation or nitration reaction VI on aromatic to form a sixth compound of formula (9) comprising a group oxazolopyridinone derivative with a moiety RI representing a chloro group , bromo or nitro as
- oxazolopyridinone derivative with a chloro, bromo or nitro moiety may be substituted in accordance with reaction VII by a group A selected from the group of methyl halogen radicals, vinyls or 1,2-dihalogenoethyl radicals to form a seventh compound of formula (10 ) comprising an oxazolopyridinone group as described below:
- oxazolopyridinone group may react according to an eighth reaction VIII with a phosphorus compound, optionally in the presence of an acidic linking agent, or with a salt to form an eighth compound of formula (11) comprising an oxazolopyridinone group as described below:
- oxazolopyridinone group comprising an oxazolopyridinone group are the following: - 3-chloromethyl-oxazolo [4 / 5-b] pyridin-2- (3H) -one
- the phosphorus compound reacts with the seventh compound of formula (10) comprising an oxazolopyridinone group without temperature constraints between 0 ° C and 120 ° C, preferably between 10 ° C and 70 ° C.
- the possible polar solvents are chosen, for example, from the group consisting of
- Alkanols such as methanol, ethanol, isopropanol
- Esters such as ethyl acetate
- N-alkylated amide acids N-alkylated amide acids; s radicals R1, R2, R3, R4, X and Y previously mentioned the following group:
- RI represents a hydrogen atom, a halogen or a nitro group
- R2 represents a hydrogen atom or a methyl, chloromethyl or bromomethyl group
- R3 represents an alkyl, alkoxy, alkenyloxy, alkynyloxy, alkoxyalkoxy, hexyalkoxy, phenyl, amino, monoalkylamino or dialkylamino group
- R4 represents an alkyl, alkenyl, alkynyl, alkoxyalkyl or helogenalkyl group
- X represents an oxygen or sulfur atom
- Y represents an oxygen or sulfur atom
- the first compound of formula (3) comprising an oxazolopyridinone group may be reacted according to a ninth reaction IX with EtONa in EtOH for 1h at room temperature and then with diethyl-bromopropylphosphonate in an aprotic polar solvent selected from the group consisting of acetone, acetonitrile, DMF, THF, NMP and ethyl acetate, at reflux overnight to form a sixteenth compound of formula (19) comprising an oxazolopyridinone moiety such as
- the first compound of formula (3) comprising an oxazolopyridinone group may be reacted according to an eleventh reaction XI with Br- (CH 2 ) n -Br in the presence of NaH in DMF at 110 ° C. to form an eighteenth compound of formula (21) comprising an oxazolopyridinone group such
- Which nineteenth compound of formula (22) comprising an oxazolopyridinone group may react according to a thirteenth reaction XIII with 10% NaOH and then HCl to form a twentieth compound of formula (23) comprising an aminohydroxypyridine group as mentioned hereinabove.
- an oxazolopyridinone group can react according to a fourteenth reaction XIV with arylpiperazine, in the presence of diisoproprylethylamine (iPr) 2 NEt in CH 3 CN to form a twenty-first compound of formula (24) comprising an oxazolopyridinone group such as mentioned below:
- an oxazolopyridinone group can react according to a fifteenth reaction XV with 10% NaOH and then HCl to form a twenty-second compound of formula (25) comprising an aminohydroxypyridine group as mentioned below:
- the yield depends on the isolation technique used.
- the first isolation technique is an extraction of phenol with boiling heptane for which 87.4% yield is obtained.
- the second isolation technique is a distillation of phenol and extraction of the remaining phenol with boiling heptane for which 96.8% yield is obtained.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Nitrogen Condensed Heterocyclic Rings (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
Description
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Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP18175310.4A EP3575305A1 (fr) | 2018-05-31 | 2018-05-31 | Procédé de fabrication de composés comprenant un groupe fonctionnel oxazolopyridinones |
PCT/EP2019/064000 WO2019229141A1 (fr) | 2018-05-31 | 2019-05-29 | Procede de fabrication de composes comprenant un groupe fonctionnel oxazolopyridinones |
Publications (1)
Publication Number | Publication Date |
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EP3802547A1 true EP3802547A1 (fr) | 2021-04-14 |
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Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
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EP18175310.4A Withdrawn EP3575305A1 (fr) | 2018-05-31 | 2018-05-31 | Procédé de fabrication de composés comprenant un groupe fonctionnel oxazolopyridinones |
EP19728382.3A Withdrawn EP3802547A1 (fr) | 2018-05-31 | 2019-05-29 | Procede de fabrication de composes comprenant un groupe fonctionnel oxazolopyridinones |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
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EP18175310.4A Withdrawn EP3575305A1 (fr) | 2018-05-31 | 2018-05-31 | Procédé de fabrication de composés comprenant un groupe fonctionnel oxazolopyridinones |
Country Status (2)
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EP (2) | EP3575305A1 (fr) |
WO (1) | WO2019229141A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN114560873B (zh) * | 2021-12-27 | 2023-02-28 | 浙江日出药业有限公司 | 一种3-氯甲基-6-氯-噁唑[4,5-b]吡啶-2(3H)酮的制备方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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PE20090717A1 (es) * | 2007-05-18 | 2009-07-18 | Smithkline Beecham Corp | Derivados de quinolina como inhibidores de la pi3 quinasa |
GB0807609D0 (en) | 2008-04-25 | 2008-06-04 | Cancer Rec Tech Ltd | Therapeutic compounds and their use |
EP2454244B1 (fr) * | 2009-07-15 | 2013-06-26 | Lupin Limited | Procédé perfectionné de préparation d'efavirenz |
CN103073596B (zh) * | 2012-12-19 | 2015-08-12 | 宁波远利化工有限公司 | 一种用于全密封清洁化生产甲基吡啶磷的工艺 |
CN105924454A (zh) | 2016-05-08 | 2016-09-07 | 邯郸市赵都精细化工有限公司 | 一种甲基吡啶磷中间体噁唑[4,5-b]吡啶-2(3H)酮的制备方法 |
-
2018
- 2018-05-31 EP EP18175310.4A patent/EP3575305A1/fr not_active Withdrawn
-
2019
- 2019-05-29 EP EP19728382.3A patent/EP3802547A1/fr not_active Withdrawn
- 2019-05-29 WO PCT/EP2019/064000 patent/WO2019229141A1/fr unknown
Also Published As
Publication number | Publication date |
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WO2019229141A1 (fr) | 2019-12-05 |
EP3575305A1 (fr) | 2019-12-04 |
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