PROCESS FOR PREPARATION OF (S)-ALPHA-HALOME THYLPYRIDINE METHANOL DERIVATIVES
申请人:KANEKA CORPORATION
公开号:EP1454899A1
公开(公告)日:2004-09-08
The present invention provides a process for easily preparing a (S)-α-halomethylpyridine-methanol derivative, which is useful as an intermediate of pharmaceutical products, from inexpensive raw materials. The (S)-α-halomethylpyridine-methanol derivative is prepared by (S)-selectively reducing a 2-haloacetylpyridine derivative using an enzyme source having ability to (S)-selectively reduce a carbonyl group of the 2-haloacetylpyridine derivative, which can be obtained inexpensively. Also, a hydrohalic acid salt of (S)-α-halomethyl-3-pyridine-methanol derivative is isolated and purified as crystal from a (S)-α-halomethyl-3-pyridine-methanol derivative containing impurities using hydrohalic acid and an organic solvent.
Process for preparation of (s)-alpha-halomethylpyridine-methanol derivatives
申请人:——
公开号:US20040265991A1
公开(公告)日:2004-12-30
The present invention provides a process for easily preparing a (S)-&agr;-halomethylpyridine-methanol derivative, which is useful as an intermediate of pharmaceutical products, from inexpensive raw materials. The (S)-&agr;-halomethylpyridine-methanol derivative is prepared by (S)-selectively reducing a 2-haloacetylpyridine derivative using an enzyme source having ability to (S)-selectively reduce a carbonyl group of the 2-haloacetylpyridine derivative, which can be obtained inexpensively. Also, a hydrohalic acid salt of (S)-&agr;-halomethyl-3-pyridine-methanol derivative is isolated and purified as crystal from a (S)-&agr;-halomethyl-3-pyridine-methanol derivative containing impurities using hydrohalic acid and an organic solvent.
anti-Prelog microbial reduction of aryl α-halomethyl or α-hydroxymethyl ketones with Geotrichum sp. 38
作者:Zhi-Liang Wei、Zu-Yi Li、Guo-Qiang Lin
DOI:10.1016/s0040-4020(98)00796-0
日期:1998.10
Reduction of aryl α-halomethyl ketones 5a-d and 7a-h and α-hydroxymethyl ketones 10a-b by Geotrichum sp. 38 affording mostly the anti-Prelog alcohols was reported and the stereoselectivities of the reductiveproducts were discussed.