Chemoenzymatic Asymmetric Total Synthesis of Nonanolide (<i>Z</i>)-Cytospolides D, E and Their Stereoisomers
作者:Rohan Kalyan Rej、Samik Nanda
DOI:10.1002/ejoc.201301365
日期:2014.2
asymmetric total synthesis of the (Z)-isomer of the naturally occurring decanolide cytospolides D, E and six stereoisomers is reported. The main highlight of the synthetic venture involves ring-closing metathesis (RCM) reaction of a suitably functionalized ester compound, which was assembled by the Yamaguchi coupling of the required acid and alcohol fragments. The alcohol fragment was accessed by two
据报道,天然存在的癸内酯细胞质 D、E 和六种立体异构体的 (Z)-异构体的化学酶不对称全合成。该合成企业的主要亮点涉及适当官能化的酯化合物的闭环复分解 (RCM) 反应,该反应通过所需的酸和醇片段的 Yamaguchi 偶联组装而成。醇片段通过两种替代的化学酶促过程获得,一种是羟腈裂解酶介导的氢氰化,而脂肪酶催化的酯交换是第二种途径中的关键 sep。酸片段是通过前手性 2-甲基-1,3-丙二醇和 Corey-Bakshi-Shibata (CBS) 介导的立体选择性羰基还原的对映选择性酶解对称 (EED) 构建的。