作者:Biswanath Das、P. Madhusudhan
DOI:10.1016/s0040-4020(99)00397-x
日期:1999.6
The naturally occurring alkaloids, camptothecin and mappicine ketone were converted to racemic mappicine acetate which was enantioselectively hydrolyzed to (S)- and (R)-mappicines in high optical purity using baker's yeast and a lipase, Amano PS. Treatment of the racemic acetate with baker's yeast afforded (S)-mappicine while with Amano PS yielded (R)-mappicine. 9-Methoxycamptothecin and 9-methoxymappicine ketone underwent similar conversion to (S)- and (R)-9-methxymappicines. (C) 1999 Elsevier Science Ltd. All rights reserved.