The synthesis of (R)-(+)-lipoic acid using a monooxygenase-catalysed biotransformation as the key step
摘要:
2-(2-Acetoxyethyl)cyclohexanone (4) was converted into the lactone (-)-(5) regio- and enantioselectively using 2-oxo-Delta(3)-4,5,5-trimethylcyclopentenyl acetyl-CoA monooxygenase, an NADPH-dependent Baeyer-Villiger monooxygenase from camphor grown Pseudomonas putida NCIMB 10007. The lactone (-)-(5) was converted into (R)-(+)-lipoic acid in six steps. In contrast cyclopentanone monooxygenase, an NADPH-dependent Baeyer-Villiger monooxygenase from cyclopentanol-grown Pseudomonas sp. NCIMB 9872 selectively oxidized the (S)-enantiomer of the ketone (4) giving better access to optically enriched, naturally occurring lipoic acid. (C) 1997, Elsevier Science Ltd.
Application of enzymic Baeyer–Villiger oxidations of 2-substituted cycloalkanones to the total synthesis of (R)-(+)-lipoic acid
作者:Brian Adger、M. Teresa Bes、Gideon Grogan、Ray McCague、Sandrine Pedragosa-Moreau、Stanley M. Roberts、Raffaella Villa、Peter W. H. Wan、Andew J. Willetts
DOI:10.1039/c39950001563
日期:——
Oxidation of ketones 1aâh using a monooxygenase from Pseudomonas putida NCIMB 10007 gave the lactones 2aâh in optically active form: lactone 2h was converted into (R)-(+)-lipoic acid 9.
[EN] PROCESS FOR THE PRODUCTION OF LIPOIC ACID<br/>[FR] PROCEDE DE PRODUCTION D'ACIDE LIPOIQUE
申请人:ASTA MEDICA AKTIENGESELLSCHAFT
公开号:WO1996038437A1
公开(公告)日:1996-12-05
(EN) A process for the preparation of lipoic acid (thioctic acid), or a derivative thereof, is one in which a 2-substituted cyclohexanone is transformed in an oxidation reaction to a lactone having formula (I), wherein X is a heteroatom substituent.(FR) Cette invention concere un procédé de préparation d'acide lipoïque (acide thioctique) ou d'un de ses dérivés, durant lequel un cyclohexanone 2-substitué est transformé, lors d'une réaction d'oxydation, en un lactone corespondant à la formule (I) où X est un substituant d'hétéroatome.