作者:Hikaru Sato、Eunsang Kwon、Yuka Taguchi、Shinichiro Yoshida、Shigefumi Kuwahara、Yusuke Ogura
DOI:10.1021/acs.jnatprod.8b01063
日期:2019.7.26
auxiliary-directed asymmetric alkylation and the Evans asymmetric aldol reaction as the chirality-inducing steps. The 1H and 13C NMR data as well as the specific rotation value of natural NFAT-133 were not identical to those of the proposed structure, but were in good agreement with those of its C10 epimer. This led us to conclude that the absolute configuration of NFAT-133 should be revised to 10S, 11R, and 12S.
从链霉菌属物种中分离出来的NFAT-133是一种具有三个连续立体中心的免疫抑制,抗糖尿病和抗锥os芳香族聚酮化合物。NFAT-133 [(10R,11R,12S)-1]及其C10差向异构体[(10S,11R,12S)-1]的结构的第一个对映选择性全合成是通过已知的芳族酯(5)通过这是一个10个步骤的序列,其特征在于手性诱导的不对称烷基化反应和Evans不对称醛醇缩合反应为手性诱导步骤。天然NFAT-133的1H和13C NMR数据以及比旋光度与拟议结构的数据不同,但与其C10差向异构体的数据非常一致。这使我们得出结论,NFAT-133的绝对配置应修改为10S,11R和12S。