EP0504351A1 - Procede pour la fabrication de 4-aryle-2-pyrrolidinones optiquement actifs - Google Patents

Procede pour la fabrication de 4-aryle-2-pyrrolidinones optiquement actifs

Info

Publication number
EP0504351A1
EP0504351A1 EP91917189A EP91917189A EP0504351A1 EP 0504351 A1 EP0504351 A1 EP 0504351A1 EP 91917189 A EP91917189 A EP 91917189A EP 91917189 A EP91917189 A EP 91917189A EP 0504351 A1 EP0504351 A1 EP 0504351A1
Authority
EP
European Patent Office
Prior art keywords
optically active
formula
aryl
pyrrolidinones
compound
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Withdrawn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
EP91917189A
Other languages
German (de)
English (en)
Inventor
Johann Mulzer
Ralf Zuhse
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.)
Bayer Pharma AG
Original Assignee
Schering 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 Schering AG filed Critical Schering AG
Publication of EP0504351A1 publication Critical patent/EP0504351A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D207/00—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom
    • C07D207/02—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom
    • C07D207/18—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member
    • C07D207/22—Heterocyclic compounds containing five-membered rings not condensed with other rings, with one nitrogen atom as the only ring hetero atom with only hydrogen or carbon atoms directly attached to the ring nitrogen atom having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D207/24—Oxygen or sulfur atoms
    • C07D207/26—2-Pyrrolidones
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D263/00—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings
    • C07D263/02—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings
    • C07D263/08—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
    • C07D263/16—Heterocyclic compounds containing 1,3-oxazole or hydrogenated 1,3-oxazole rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, e.g. ester or nitrile radicals, directly attached to ring carbon atoms
    • C07D263/18—Oxygen atoms
    • C07D263/20—Oxygen atoms attached in position 2
    • C07D263/26—Oxygen atoms attached in position 2 with hetero atoms or acyl radicals directly attached to the ring nitrogen atom

Definitions

  • the invention relates to the process for the preparation of optically active 4-aryl-2-pyrrolidinones and the process for the preparation of the optically active starting compounds which are suitable as intermediates for the preparation of the 4S or 4R enantiomers of 4-aryl-2-pyrrolidinones.
  • the desired (4S) - or (4R) -4-aryl-2-pyrrolidinones can be prepared from the easily accessible optically active starting compounds in a simple synthesis and can be isolated in high optical purity and good yield without expensive separation operations.
  • the recovery of the auxiliary is to be regarded as an additional advantage of the method according to the invention.
  • the invention relates to the process for producing (4S) - or
  • R 1 is hydrogen or a hydrocarbon radical with up to 7 carbon atoms and R 2 C 1-4 alkyl which is optionally interrupted by an oxygen atom, characterized in that an optically active compound of the formula II
  • R 1 has the meaning of R1 or represents an easily removable group
  • R 2 is C 1-4 alkyl
  • Suitable hydrocarbon radicals R 1 are saturated or unsaturated, straight-chain or branched alkyl groups with 1-6 carbon atoms, preferably 1-4 carbon atoms, furthermore C 4-6 cycloalkylalkyl and cycloalkyl groups with 3-7 carbon atoms and the benzyl group and cycloalkyl groups interrupted by an oxygen atom.
  • saturated alkyl groups are, for example, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, sec. Butyl, tert. Butyl, pentyl, 2,2-dimethylpropyl and hexyl suitable.
  • alkenyl and alkynyl groups 2-propenyl, 2-propionyl.
  • hydrocarbon radical R 1 is a cycloalkyl group, it means cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl, preferably C 3-5 cycloalkyl groups. Cyclopropylmethyl, cyclopropylethyl and cyclopentylmethyl are to be regarded as preferred for the cycloalkyl-alkyl group.
  • hydrocarbon radical is interrupted by an oxygen atom
  • a further asymmetry center can be present, which can be converted into the antipodes in the usual way.
  • the term “easily removable group” means that the hydroxyl protective group can be easily removed either under the reaction conditions or subsequently in the customary manner.
  • the protecting groups include, for example, the methoxymethyl, methoxyethoxymethyl and also the benzyl group.
  • the commonly used hydrogenation catalysts such as, for example, are suitable as catalysts for the reaction according to the invention Raney nickel or precious metal catalysts such as platinum oxide and palladium / carbon.
  • the reaction takes place at room temperature or with heating to 50 ° C. under normal hydrogen pressure or elevated hydrogen pressure (approx. 50 bar) in an aqueous suspension or in inert solvents such as alcohols, esters or ketones or mixtures thereof.
  • the reaction is generally complete after 1 to 10 hours.
  • the etherification is carried out by reaction with a corresponding tosylate, mesylate or halide in the presence of a base such as alkali metal hydroxides and carbonates and tetrabutylammonium hydrogen sulfate in inert solvents such as dimethyl sulfoxide, dimethylformamide, acetonitrile, tetrahydrofuran, methylene chloride or alcohols at room temperature to the boiling point of the solvent.
  • a base such as alkali metal hydroxides and carbonates and tetrabutylammonium hydrogen sulfate
  • inert solvents such as dimethyl sulfoxide, dimethylformamide, acetonitrile, tetrahydrofuran, methylene chloride or alcohols at room temperature to the boiling point of the solvent.
  • the invention further relates to the compounds of formula II, which are optically active starting compounds, from which the compounds of formula I are obtained with very high optical purity in one reaction step.
  • the invention also relates to the process for the preparation of the compounds of formula II, characterized in that an optically active
  • the addition takes place in the manner of a Michael addition, by forming the enolate amone of compound III with strong bases and adding it to the olefin.
  • the reaction takes place at low temperatures (- 110 ° C to - 40 ° C) in aprotic solvents such as cyclic ethers, for example dioxane or tetrahydrofuran.
  • aprotic solvents such as cyclic ethers, for example dioxane or tetrahydrofuran.
  • the bases are, for example, alkali salts such as
  • the antipode is obtained after the addition of the olefin in good yields and high optical purity after recrystallization.
  • the starting compound of formula III can be prepared by acetylation of (4S) - or (4R) -4-benzyl-2-oxazolidinone by customary methods.
  • the acetylation can for example in the presence of strong bases such as butyllithium, lithium diisopropylamide, NaH and. a. in aprotic solvents such as cyclic ethers or hydrocarbons or in a two-phase system according to the method described by V. Illi Synthesis 1979, 387.
  • the starting compounds of the formula IV can be synthesized, for example, by aldol condensation of the aldehyde with nitromethane (C.B. Gairand, G.R. Lappin 1. Org. Chem. 18, 1 (1953).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Procédé stéréosélectif pour la fabrication de (4R)- ou (4S)-4-Aryle-2-pyrrolidinones de formule (I) où R1 représente l'oxygène ou, le cas échéant, un radical d'hydrocarbure interrompu par un atome d'oxygène et ayant jusqu'à 7 atomes de carbone, et où R2 représente un groupe alkyle C1-4. L'invention concerne également des produits intermédiaires et le procédé stéréosélectif pour la fabrication des produits intermédiaires optiquement actifs.
EP91917189A 1990-10-05 1991-09-27 Procede pour la fabrication de 4-aryle-2-pyrrolidinones optiquement actifs Withdrawn EP0504351A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4032055A DE4032055A1 (de) 1990-10-05 1990-10-05 Verfahren zur herstellung von optisch aktiven 4-aryl-2-pyrrolidinonen
DE4032055 1990-10-05

Publications (1)

Publication Number Publication Date
EP0504351A1 true EP0504351A1 (fr) 1992-09-23

Family

ID=6415955

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91917189A Withdrawn EP0504351A1 (fr) 1990-10-05 1991-09-27 Procede pour la fabrication de 4-aryle-2-pyrrolidinones optiquement actifs

Country Status (6)

Country Link
US (1) US5298628A (fr)
EP (1) EP0504351A1 (fr)
JP (1) JPH05502895A (fr)
CA (1) CA2070653A1 (fr)
DE (1) DE4032055A1 (fr)
WO (1) WO1992006077A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10038355A1 (de) 2000-08-05 2002-02-28 Mengel & Kuehlborn Geraetebau Torabdichtung einer Verladeöffnung eines Gebäudes
EP2066174B1 (fr) 2006-09-12 2017-11-08 Beth Israel Deaconess Medical Center, Inc. Compositions contenant de l'alpha-1-antitrypsine et leurs procédés d'utilisation

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2413935A1 (de) * 1974-03-20 1975-10-16 Schering Ag 4-(polyalkoxy-phenyl)-2-pyrrolidone
US4193926A (en) * 1974-03-20 1980-03-18 Schering Aktiengesellschaft 4-(Polyalkoxy phenyl)-2-pyrrolidones
DE2541855A1 (de) * 1975-09-18 1977-03-31 Schering Ag 4-(polyalkoxy-phenyl)-2-pyrrolidone ii

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9206077A1 *

Also Published As

Publication number Publication date
JPH05502895A (ja) 1993-05-20
US5298628A (en) 1994-03-29
WO1992006077A1 (fr) 1992-04-16
CA2070653A1 (fr) 1992-04-06
DE4032055A1 (de) 1992-04-09

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