Enzymatic resolution of a quaternary stereogenic centre as the key step in the synthesis of (S)-(+)-citalopram
作者:Laura F. Solares、Rosario Brieva、Margarita Quirós、Isidro Llorente、Miguel Bayod、Vicente Gotor
DOI:10.1016/j.tetasy.2003.10.022
日期:2004.1
The enzymatic resolution of 4-[(4-dimethylamino)-1-(4'-fluorophenyl)-1-hydroxy-1-butyl]-3-(hydroxymethyl)-benzonitrile, a useful intermediate in the synthesis of enantionterically pure citalopram, has been studied. Candida antarelica lipase B (CAL-B) catalyzes the enzymatic acetylation of the primary benzylic alcohol with high en anti oselectivity at the quaternary stereogenic centre. The enzymatic en anti oselective hydrolysis of the 3-acetyloxymethyl derivative catalyzed by CAL-B is also possible. (C) 2003 Elsevier Ltd. All rights reserved.