Non-dehydrative pinacol rearrangement using a Lewis acid-trialkyl orthoester combined system
作者:Yasuyuki Kita、Yutaka Yoshida、Sachiko Mihara、Akihiro Furukawa、Kazuhiro Higuchi、Dai-Fei Fang、Hiromichi Fujioka
DOI:10.1016/s0040-4020(98)00948-x
日期:1998.12
An efficient pinacol rearrangement mediated by trialkyl orthoformate has been developed. The reactions of various types of diols with a catalytic amount of a Lewis acid in the presence of an ortho ester afforded the rearranged product in good yields via a cyclic ortho ester intermediate. This combined system is applicable not only to cyclic and acyclic tri- and tetra-substituted diols but also to the
已经开发了由原甲酸三烷基酯介导的有效频哪醇重排。在原酸酯的存在下,各种类型的二醇与催化量的路易斯酸的反应通过环状原酸酯中间体以良好的产率提供了重排产物。该组合体系不仅适用于环状和无环的三和四取代的二醇,而且适用于具有酸敏感性缩醛的二醇。