作者:Yujiro Hayashi、Jun Kanayama、Junichiro Yamaguchi、Mitsuru Shoji
DOI:10.1021/jo025641m
日期:2002.12.1
A stereocontrolled total synthesis of both the (+)- and (-)-epolactaene ((+)- and (-)-1) enantiomers from tetrahydropyran-2-ol is described. The following reactions in this synthesis are particularly noteworthy: (1) the stereoselective construction of the conjugated (E,E,E)-triene by a combination of kinetic deprotonation and thermodynamic equilibration, (2) the E-selective Knoevenagel condensation
描述了由四氢吡喃-2-醇立体控制的(+)-和(-)-上乙烯((+)-和(-)-1)对映异构体的全合成。此合成中的以下反应特别值得注意:(1)通过动力学去质子化和热力学平衡相结合的方式,对共轭(E,E,E)-三烯进行立体选择性构建,(2)β-带有手性2-烷氧基醛的乙腈33,(3)使用大体积亲核试剂(TrOOLi)和适当的保护基团进行非对映选择性环氧化,(4)硅胶在TLC上通过羟基-促进的α-环氧腈的温和水解介导的分子内协助。