ROSUVASTATIN CALCIUM INTERMEDIATE AND PREPARATION METHOD THEREOF
申请人:Porton Fine Chemicals Ltd
公开号:EP2557084B1
公开(公告)日:2014-06-18
US8933269B2
申请人:——
公开号:US8933269B2
公开(公告)日:2015-01-13
ROSUVASTATIN CALCIUM INTERMEDIATE AND METHOD FOR PREPARING THE SAME
申请人:LIN Wenqing
公开号:US20120310000A1
公开(公告)日:2012-12-06
A method for preparing a rosuvastatin calcium intermediate, including a) contacting a halogenated ethene with magnesium metal to obtain a halogenated ethene Grignard reagent, and carrying out a Grignard reaction between the halogenated ethene Grignard reagent and R-epichlorohydrin; b) adding sodium cyanide for carrying out a nucleophilic substitution reaction; c) adding alcohol for carrying out an alcoholysis reaction; d) adding a basic solvent for carrying out protection of a first hydroxyl group; e) selectively oxidizing a second hydroxyl group; and f) adding triphenylphosphine in alkaline condition for carrying out a Wittig reaction.