Chemoenzymatic asymmetric total syntheses of a constituent of Jamaican rum and of (+)-Pestalotin using an enantioconvergent enzyme-triggered cascade reaction
作者:Sandra F. Mayer、Andreas Steinreiber、Marian Goriup、Robert Saf、Kurt Faber
DOI:10.1016/s0957-4166(02)00124-6
日期:2002.4
(−)-Pestalotin—was accomplished based on an enzyme-triggered cascade-reaction. Thus, a racemic halomethyl oxirane was hydrolyzed by bacterial epoxide hydrolases to furnish the corresponding vic-halomethyl-diol, which underwent spontaneous ring-closure to furnish an epoxy alcohol in up to 93% e.e. and ≥99 d.e. Due to the fact that this process was enantioconvergent, the occurrence of the undesired enantiomer
基于酶触发的级联反应,完成了一条短促的化学酶促途径,可产生两种天然产物,第一种是牙买加朗姆酒的成分,第二种是赤霉素增效剂(-)-Pestalotin的(+)-正肽。因此,外消旋卤代甲基环氧乙烷用细菌环氧化物水解酶水解成相应的提供VIC -halomethyl二醇,其经历了自发闭环以提供在向上的环氧醇至93%ee的和≥99德由于这样的事实,这个过程是对映体会聚的,完全避免了不希望的对映异构体的出现。