Stereoselective synthesis of chiral β-amino trifluoromethyl alcohol: development of a manufacturing process for a key intermediate in the production of a novel elastase inhibitor, AE-3763
摘要:
We have successfully synthesized chiral beta-amino trifluoromethyl alcohol (2S,3S)-7a, which is a key intermediate in the production of AE-3763, by stereoselective reduction of N-Cbz-protected 5-hydroxy-5-(trifluoromethyl)-1,3-oxazolidine 4 prepared from L-valine in 3 steps followed by alkaline hydrolysis. This new method can be applied to the industrial-scale synthesis of AE-3763. (C) 2010 Elsevier Ltd. All rights reserved.
PROCESSES FOR PRODUCING (AMINOMETHYL)TRIFLUOROCARBINOL DERIVATIVES
申请人:Dainippon Pharmaceutical Co., Ltd.
公开号:EP1243576A1
公开(公告)日:2002-09-25
The present invention provides a process for industrially producing (aminomethyl)trifluoromethylcarbinol derivatives (I), in particularly, optically active compounds thereof, which are useful as starting compounds for drugs such as protease inhibitors, etc. The present invention relates to a process for producing the compound (I) from 1,3-oxazolidin-5-one derivative (II) being easily derived from an α-amino acid, which is carried out stepwise or by one-spot reaction, and further relates to a process for producing the compound (I) comprising the reduction of the 5-hydroxy compound (II).
wherein R1 is a group corresponding to the side chain of a natural or non-natural α-amino acid, R2 is a hydrogen atom or R21 (in which R21 is a protecting group for amino group having a carbonyl group at the binding site to the nitrogen atom).