Enzymatic resolution of new carbonate intermediates for the synthesis of (S)-(+)-zopiclone
摘要:
The lipase from Candida antaretica B catalyzes the enantioselective hydrolysis of (+/-)-6-(5-chloropyridin-2-yl)-7-chloromethyloxycarbonyloxy-6,7-dihydro-5H-pyrrolo[3,4-b]pyrazin-5-one, a useful intermediate in the synthesis of (S)-(+)-zopiclone. This enzyme also catalyzes the resolution of the corresponding 2-chloroethylcarbonate derivative. (C) 2002 Elsevier Science Ltd. All rights reserved.