Regio-selective synthesis of 1,2-aminoalcohols from epoxides and chlorohydrins
摘要:
A simple and efficient procedure for the regio-selective synthesis of 1,2-aminoalcohols from terminal epoxides and chlorohydrins by using NaHMDS as the source of amine is reported. The wider scope and utility of this method is demonstrated. (C) 2012 Elsevier Ltd. All rights reserved.
stereoselective hydroxylation and enantioselective dehalogenation cascade reaction was developed for the synthesis of optically active β-haloalcohols from halohydrocarbons. This cascade system employed P450 and halohydrin dehalogenase as two compatible biocatalysts, allowing a straightforward, greener and efficient access to β-halohydrins with excellent enantioselectivities (98–99%).
The present invention relates to a method for fractionating stereoisomeric compounds which have at least one alcohol and/or amino group.
本发明涉及一种用于分离具有至少一种醇和/或氨基团的立体异构化合物的方法。
Method of manufacturing optically active (-)-2-halo-1-(substituted
申请人:Kanegafuchi Kagaku Kogyo Kabushiki Kaisha
公开号:US05266485A1
公开(公告)日:1993-11-30
A method is proposed for manufacturing (-)-2-bromo-1-(3'-chlorophenyl) ethanol by bringing a 2-bromo-1-(3'-chlorophenyl) ethanone into contact with a microorganism belonging to 9 genuses including Ashbya genus and Brettanomycess genus to thereby reduce it asymmetrically into (-)-2-bromo-1-(3'-chlorophenyl) ethanol, and for manufacturing (-)-substituted styrene oxide by cyclizing the obtained alcohol under alkaline conditions. The (-)-substituted styrene oxide can be manufactured efficiently.
Process for the enantioselective preparation of secondary alcohols by lipase-catalyzed solvolysis of the corresponding acetoacetic esters
申请人:Popp Alfred
公开号:US20050032182A1
公开(公告)日:2005-02-10
Process for the enantioselective preparation of secondary alcohols, wherein a racemic or enantiomerically enriched mixture of acetoacetic esters of chiral secondary alcohols is subjected to enantioselective enzymatic solvolysis in the presence of a nucleophile and a lipase capable of the solvolytic cleavage of an ester group.