Diastereomeric Resolution of Racemic<i>o</i>-Chloromandelic Acid
作者:Pei Wang、En Zhang、Peng Zhao、Qing-Hua Ren、Yuan-Yuan Guan、Hong-Min Liu
DOI:10.1002/chir.22089
日期:2012.12
The separation of rac‐o‐chloromandelic acid 1 with enantiopure aryloxypropylamine via diastereomeric salt formation was investigated. (R)‐o‐chloromandelic acid (R)‐1, a key intermediate for the antithrombotic agent clopidogrel, was obtained in 65% yield and 98% ee by Dutch resolution of rac‐1 with (S)‐2‐hydroxyl‐3‐(p‐chlorophenoxy) propylamine (S)‐5 as resolving agent and (S)‐2‐hydroxyl‐3‐(o‐nitrophenoxy)