作者:Karsten Krohn、Wolfgang Baltus
DOI:10.1016/s0040-4020(01)85091-2
日期:1988.1
Racemic fridamycin E (-1) was synthesized in two ways: 1. Addition of lithium -butyl acetate to ketone 15 followed by ether and ester cleavage to -1; 2. Grignard reaction of allylmagnesium bromide with 15 to -18 and subsequent ozonolysis, oxidation, methylation, ester and ether cleavage. The enantiomer -18 was obtained by Marschalk reaction of 7 with the chiral building block 20 derived from (S)-lactic
外消旋fridamycin E(-1)的合成方法有两种:1.将乙酸丁酯锂添加到酮15中,然后将醚和酯裂解为-1。2.烯丙基溴化镁与15至-18的格氏反应,然后进行臭氧分解,氧化,甲基化,酯和醚裂解。对映体-18通过7与来自(S)-乳酸的手性结构单元20的Marschalk反应获得。类似的反应序列将-18转化为-1,从而证明天然fridamycin E具有(R)-构型。