EP1636199A2 - Procede de production de derives d'acide phenylacetique - Google Patents

Procede de production de derives d'acide phenylacetique

Info

Publication number
EP1636199A2
EP1636199A2 EP04732562A EP04732562A EP1636199A2 EP 1636199 A2 EP1636199 A2 EP 1636199A2 EP 04732562 A EP04732562 A EP 04732562A EP 04732562 A EP04732562 A EP 04732562A EP 1636199 A2 EP1636199 A2 EP 1636199A2
Authority
EP
European Patent Office
Prior art keywords
acid
general formula
compound
propyl
methyl
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Withdrawn
Application number
EP04732562A
Other languages
German (de)
English (en)
Inventor
Rainer Heck
Michael Justus
Roland Müller
Thomas Otten
Martin Rettig
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.)
Cilag AG
Original Assignee
Cilag AG
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
Application filed by Cilag AG filed Critical Cilag AG
Publication of EP1636199A2 publication Critical patent/EP1636199A2/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D295/00—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms
    • C07D295/04—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms
    • C07D295/12—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms
    • C07D295/135—Heterocyclic compounds containing polymethylene-imine rings with at least five ring members, 3-azabicyclo [3.2.2] nonane, piperazine, morpholine or thiomorpholine rings, having only hydrogen atoms directly attached to the ring carbon atoms with substituted hydrocarbon radicals attached to ring nitrogen atoms substituted by singly or doubly bound nitrogen atoms with the ring nitrogen atoms and the substituent nitrogen atoms separated by carbocyclic rings or by carbon chains interrupted by carbocyclic rings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups

Definitions

  • the present invention relates to a process for the preparation of phenylacetic acid derivatives, in particular
  • Repaglinide and related compounds are e.g. in EP 0 589 874 and EP 0 965 591. These compounds in particular have a hypoglycemic effect.
  • the corresponding primary amine i.e. a (S) -1- (2-piperidino-phenyl) -1-alkylamine, or (S) -1- (2-piperidino-phenyl) -1-benzylamine, reacted with an appropriately substituted phenylacetic acid.
  • the carboxyl group protected as an ester group and bound to the phenyl ring is then converted from the compound obtained into the free carboxyl group.
  • R- L is a linear or branched alkyl radical with 1-6
  • R 2 is methyl, ethyl or propyl, which is characterized in that one
  • R 3 represents a leaving group or a suitable salt of a compound of the general formula (II), with a compound of the general formula (III)
  • R 2 has the meaning given above, and R 4 represents hydrogen or a hydrolytically removable protective group, and then the optionally present hydrolytically removable protective group R 4 is removed.
  • R- L is preferably methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, 2-methyl-propyl or benzyl, preferably 2-methyl-propyl.
  • R 2 is preferably ethyl.
  • R 3 as a leaving group preferably denotes benzyl or substituted benzyl or allyl, preferably substituted benzyl, which is substituted on the phenyl ring by at least one electronegative, electron-donating substituent.
  • electronegative substituents are, for example, ( ⁇ ) alkoxy, preferably methoxy or ethoxy, or chlorine.
  • benzyl residues as
  • Leaving group can be used which carry a suitable, preferably electronegative, electron-donating substituent on the methylene (-CH 2 -) of the benzyl radical, such as ( ⁇ ) -alkyl or optionally substituted phenyl, in the latter case the methylene preferably two identical optionally substituted phenyl rings.
  • Benzyl which is substituted on the phenyl ring by at least one methoxy group is preferred.
  • R 3 is preferably 2-methoxybenzyl, 4-methoxybenzyl, or 2, 4-dimethoxybenzyl.
  • R 4 preferably denotes hydrogen, methyl, ethyl, butyl, propyl and optionally substituted benzyl, preferably ethyl, butyl, propyl or benzyl.
  • the reaction of the compound of formula (II) with a compound of formula (III) can be carried out under reaction conditions as are known from analogous reactions.
  • the substituent R 3 of the compound of the general formula (II) is stable in alkaline conditions, but can be replaced or split off, for example, in an acidic environment.
  • the coupling for the amide bond is preferably carried out in an organic solvent, such as, for example, benzene, toluene, tetrahydrofuran, ethyl acetate, methyl acetate, acetonitrile, dimethylformamide, preferably in an aprotic solvent, preferably in a polar aprotic solvent.
  • the leaving group is split in the presence of an acid, such as hydrochloric acid, sulfuric acid, perchloric acid, trifluoroacetic acid, methanesulfonic acid, chlorosulfonic acid, p-toluenesulfonic acid, benzenesulfonic acid, preferably methanesulfonic acid, chlorosulfonic acid and / or p-toluenesulfonic acid, preferably methanesulfonic acid, preferably methanesulfonic acid, preferably methanesulfonic acid, preferably methanesulfonic acid. if necessary at elevated temperature. If necessary, the reaction is carried out at the reflux temperature.
  • An acid value (pH) of less than 2 (pH ⁇ 2) is preferably used for this reaction, such as values in the presence of the acids mentioned, preferably in
  • the molar ratio of the compound of the formula (II), or a suitable salt of the compound of the formula (II), to the acid used is preferably in the range from 1: 1 to 1:50, preferably in the range from 1: 1 to 1: 5th
  • preferred preferred salts of the compound of the formula (II) are, in particular, salts of the compound of the formula (II) with optically active chiral acids known per se (referred to herein as "A"), such as, for example, optically active carboxylic acids, such as mandelic acid [C 6 H S - * CH (OH) COOH], which is optionally substituted on the phenyl ring, optically active camphorsulfonic acid, optically active tartaric acid and optically active substituted tartaric acids or else optically active phosphoric acids, such as 1.
  • the present invention relates to a
  • Substituted optically active mandelic acids are, for example, o-chloromandelic acid, p-chloromandelic acid, p-bromomandelic acid.
  • Substituted optically active tartaric acids are tartaric acids esterified on the hydroxyl groups, for example di-0,0'-p-toluyl-tartaric acid or di-O, O '-pivaloyl-tartaric acid.
  • the salt of formula (V) is formed, from which the amine of formula (II) can be obtained in high optical purity.
  • the suitable chiral acid is occasionally optically left-turning or right-turning.
  • the left-handed form is preferably used for the mandelic acid and the 2-chloromandelic acid. Whether the left- or right-rotating acid is optimal for the separation of the racemate can easily be determined by the person skilled in the art for the particular acid used.
  • the described splitting of the racemic mixture of compounds corresponding to the general formula (IV) with a chiral acid "A” is new, as is the corresponding salt corresponding to the formula (V). It is also surprising that the salt formation with the secondary amine takes place so quickly and with such a high yield and high purity.
  • the present invention relates to the compounds of the general formula (V) present as salts:
  • the present invention also relates to a process for the preparation of the compounds of the general formula (V), which is characterized in that a racemic mixture of compounds corresponding to the general formula (IV):
  • Low molecular weight alcohols for example methanol, ethanol, isop.ropanol, butanol (optionally in a mixture) are preferably used as solvents for the resolution with water, if miscible with water), low molecular weight ketones, e.g.
  • C 1 -C 3 carboxylic acid esters esterified preferably with low molecular weight alcohols, cyclic and non- cyclic ethers, for example diethyl ether, dimethoxyethane, 1,4-dioxane (optionally in a mixture with water, if water-miscible) and /
  • the molar ratio of amine [compound of the formula (IV)]: chiral acid in the preparation of the salt and the precipitation is in the range from about 3: 1 to 1:10, preferably in the range from about 2: 1 to 1: 2 ,
  • the acid value (pH) during salt formation and precipitation is preferably in the range from 3.5 to 10.0, preferably in the range from 5.0 to 7.5.
  • the reaction temperature is relatively uncritical and can be in the range from preferably 0 ° C. to 100 ° C., the salt being formed at elevated temperature and allowed to crystallize or precipitate out by cooling.
  • the present invention further relates to a process for the preparation of the compounds of the general formula (II), which is characterized in that a salt of the general formula (V) is treated with a base, preferably with alkali, and thus from it the Releases compound of general formula (II).
  • the racemic mixture of the compounds of the general formula (IV) is prepared, for example, by starting from 2-fluorobenzaldehyde and nucleophilically substituting the fluorine atom with piperidine. The resulting product is reacted with p-methoxybenzylamine to give the imine, and the imine obtained is then reacted with a Grignard reagent, the racemic mixture of the compounds corresponding to the general
  • the present invention further relates to previously unknown polymorphic forms of repaglinide.
  • Two polymorphic forms of repaglinide are known from the literature, namely one form (here called polymorphic form I) with a melting point of 132-133 ° C. and another polymorphic form (here called polymorphic form II) with a melting point of 102 ° C. It has now been found that four further polymorphic or pseudopoly- morphic forms of repaglinide exist. These other polymorphic forms have specific technical advantages, such as a different solution behavior, and are in part significantly more soluble and in part are also easier to formulate than the known forms.
  • the polymorphic form III with a melting point of 118-119 ° C. is obtained, for example, by crystallization from a mixture of 2.0 parts of isopropanol and 20 parts of cyclohexane.
  • the polymorphic form IV with a melting point of 105-107 ° C. is obtained, for example, by crystallization from a mixture of 30 parts of tert-butyl methyl ether and 27 parts of toluene.
  • the polymorphic form V with a melting point of 73-76 ° C. is obtained, for example, by crystallization from methanol.
  • This polymorphic form IV represents a hemimethanolate, ie the form contains one molecule of methanol per two molecules of repaglinide.
  • the polymorphic form VI with a melting point of 66-70 ° C. is obtained, for example, by crystallization from 50 parts of methanol and 10 parts of water.
  • This polymorphic form V is a hydrate with 0.25 equivalents of water per molecule of repaglinide.
  • Phase is added 38.5 g of 4-methoxybenzylamine (0.28 mol) and the water formed is separated off with the aid of azeotropic distillation.
  • the solution obtained is added to a freshly prepared solution of 90 g of n-propyl magnesium bromide (0.61 mol) in 630 ml of ether.
  • After complete conversion is hydrolyzed with a mixture consisting of 35.1 g of glacial acetic acid and 130 g of water.
  • 40.7 g (0.27 mol) of L-mandelic acid and 385 ml of acetonitrile are added to the separated organic phase and the mixture is heated to the reflux temperature. When cooling, crystals of the desired product are deposited after inoculation at about 50 ° C.
  • Example 3 [(S) -1- (2-piperidino-phenyl) -3-methyl-1-butyl-N-benzyl-ammonium-L-mandelate] 1.68 g (0.012 mol) of potassium carbonate are refluxed in a mixture consisting of 4 ml of toluene, 4 ml of DMF and 1.3 g (0.01 mol) of 2-fluorobenzaldehyde, and 1.02 g (0.012 mol) of piperidine are added. After 4 hours, the product obtained is hydrolyzed with 3.0 ml of water and the phases are separated.
  • the organic phase is separated and a well-stirred mixture of 49.1 g (0.19 mol) of 3-ethoxy-4-ethoxycarbonylphenylacetic acid and 43.2 g (0.27 mol) of 1,1'-carbonyl-diimidazole (CDI) in a mixture consisting of 350 ml Toluene and 200 ml of acetonitrile added.
  • CDI 1,1'-carbonyl-diimidazole
  • 300 ml of water are added and the phases are separated. 20 ml of water, 230 g (2.0 mol) of trifluoroacetic acid are first added to the organic phases. acid and then at reflux temperature 70 g (0.73 mol) methanesulfonic acid.
  • the middle phase is diluted with 100 ml of ethanol and 250 ml of toluene, and 421 g of approx. 17% potassium hydroxide solution (1.3 mol) are added.
  • the phases are separated.
  • the aqueous phase is acidified to pH 5.1 with hydrochloric acid and extracted with 300 ml of ethyl acetate.
  • the ethyl acetate phase is concentrated to a third. When cooling, the product precipitates after inoculation. It is filtered off at room temperature.
  • 4-methoxybenzylamine become a well-stirred mixture of 4.61 g (0.018 mol) of 3-ethoxy-4-ethoxycarbonyl-phenyl-acetic acid and 5.02 g (0.031 mol) of 1, 1 '-carbonyl-diimidazole in a mixture consisting of 15 ml of toluene and 10 ml of acetonitrile added. After the coupling reaction is complete, 15 ml of water are added and the phases obtained are separated. First add 2.0 ml to the organic phases
  • Example 7 [(S) (+) -2-ethoxy-4- [N- [1- (2-piperidino-phenyl) -3-methyl-1-butyl] aminocarbonylmethyl] benzoic acid] 1.0 g (0.002 mol) (S) -1- (2-piperidino-phenyl) -3-methyl-1-butyl-N-benzylammonium-L-mandelate is dissolved in 6.0 ml of toluene and 3.0 g of 4% sodium hydroxide solution ( 0.003 mol) added.
  • the organic phase is separated off and a well-stirred mixture of 0.52 g (0.002 mol) of 3-ethoxy-4-ethoxycarbonylphenylacetic acid and 0.43 g (0.0027 mol) of 1,1'-carbonyldiimidazole in a mixture consisting of 3.5 ml of toluene and 2.0 ml of acetonitrile were added.
  • 3.0 ml of water are added and the phases are separated.
  • 0.2 ml of water, 2.3 g (0.02 mol) of trifluoroacetic acid and then 0.7 g (0.007 mol) of methanesulfonic acid are added to the organic phases at reflux temperature.
  • Example 9 (Polymorph IV) 6.0 g (S) (+) -2-ethoxy-4- [N- [1- (2-piperidino-phenyl) -3-methyl-1-butyl] aminocarbonylmethyl] benzoic acid are mixed in a mixture consisting of 30 g tert- Butyl methyl ether and 27 g of toluene are heated until the solid has dissolved. It is cooled to 0 ° C. and the precipitated is filtered off

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Hydrogenated Pyridines (AREA)

Abstract

L'invention concerne un procédé de production de dérivés d'acide (S) (+) phénylacétique correspondant à la formule générale (I), dans laquelle R1 représente un reste alkyle linéaire ou ramifié possédant 1 à 6 atomes de carbone ou benzyle éventuellement substitué, et R2 représente méthyle, éthyle ou propyle. Ce procédé se caractérise en ce que l'on fait réagir un composé correspondant à la formule générale (II), dans laquelle R1 a la signification donnée ci-dessus et R3 représente un nucléofuge, ou bien un sel approprié de ce composé de formule générale (II), avec un composé correspondant à la formule générale (III), dans laquelle R2 a la signification donnée ci-dessus et R4 représente hydrogène ou un nucléofuge séparable hydrolytiquement, le groupe protecteur R4 éventuellement présent étant ensuite éliminé.
EP04732562A 2003-05-14 2004-05-13 Procede de production de derives d'acide phenylacetique Withdrawn EP1636199A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH8472003 2003-05-14
PCT/CH2004/000292 WO2004101540A2 (fr) 2003-05-14 2004-05-13 Procede de production de derives d'acide phenylacetique

Publications (1)

Publication Number Publication Date
EP1636199A2 true EP1636199A2 (fr) 2006-03-22

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ID=33438099

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04732562A Withdrawn EP1636199A2 (fr) 2003-05-14 2004-05-13 Procede de production de derives d'acide phenylacetique

Country Status (3)

Country Link
US (1) US7915421B2 (fr)
EP (1) EP1636199A2 (fr)
WO (1) WO2004101540A2 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8101769B2 (en) * 2007-02-15 2012-01-24 Actavis Group Ptc Ehf Process for preparing ethyl (S)-2-ethoxy-4-[N-[1-(2-piperidinophenyl)-3-methyl-1-butyl]aminocarbonyl methyl]benzoate and use thereof for the preparation of Repaglinide
EP2155706A2 (fr) * 2007-06-06 2010-02-24 Actavis Group PTC EHF Répaglinide sensiblement exempt d'impureté dimère
CN101481363B (zh) * 2008-01-10 2011-05-04 江苏豪森药业股份有限公司 一种制备瑞格列奈的方法
CN101538253B (zh) * 2008-03-21 2012-03-21 江苏豪森医药集团连云港宏创医药有限公司 一种制备瑞格列奈中间体的方法
WO2010046360A1 (fr) * 2008-10-20 2010-04-29 Krka, Tovarna Zdravil, D.D., Novo Mesto Procédé de synthèse de répaglinide substantiellement optiquement pure et de ses précurseurs
EP2177221A1 (fr) 2008-10-20 2010-04-21 Krka Tovarna Zdravil, D.D., Novo Mesto Procedure de préparation de répaglinide essentielment optiquement pur et ses précurseurs
EP2364977A1 (fr) * 2010-01-26 2011-09-14 Reuter Chemische Apparatebau KG Procédé d'enrichissement énantiomérique de 3-methyl-1-(2-piperidinophenyl)-1-butylamine
CN101781272B (zh) * 2010-02-11 2012-12-05 上海百灵医药科技有限公司 一种瑞格列奈胺的制备方法及其中间体
CN102786498A (zh) * 2011-05-20 2012-11-21 江苏豪森医药集团连云港宏创医药有限公司 一种制备瑞格列奈的方法
EP3214077B1 (fr) 2016-03-01 2020-03-11 Zaklady Farmaceutyczne Polpharma S.A. Procédé de purification d'un agent pharmaceutique
CN107868005A (zh) * 2016-09-28 2018-04-03 齐鲁工业大学 一种羧酸化合物的晶体结构及荧光性能

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5312924A (en) * 1983-12-30 1994-05-17 Dr. Karl Thomae Gmbh Phenylacetic acid benzylamides
DE3347565A1 (de) * 1983-12-30 1985-07-11 Thomae Gmbh Dr K Neue phenylessigsaeurederivate, diese verbindungen enthaltende arzneimittel und verfahren zu ihrer herstellung
WO1993000337A1 (fr) 1991-06-21 1993-01-07 Dr. Karl Thomae Gmbh Acides (s)(+)-2-ethoxy-4-[n-[1-(2-piperidino-phenyl)-3-methyl-1-butyl]aminocarbonylmethyl]-benzoique
EP0965591B1 (fr) 1991-06-21 2002-09-04 Boehringer Ingelheim Pharma KG Procédé pour la préparation de (S)-3-methyl-1-(2-piperidino-phényl-1-butylamine
IN192527B (fr) * 2001-09-25 2004-04-24 Ranbaxy Lab
WO2004018442A1 (fr) 2002-08-23 2004-03-04 Dr. Reddy's Laboratories Limited Formes cristalline et amorphe de (s)-repaglinide et procedes de preparation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2004101540A2 *

Also Published As

Publication number Publication date
US7915421B2 (en) 2011-03-29
WO2004101540A3 (fr) 2005-03-03
US20070123564A1 (en) 2007-05-31
WO2004101540A2 (fr) 2004-11-25

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