Total Synthesis of (−)-Chromodorolide B By a Computationally-Guided Radical Addition/Cyclization/Fragmentation Cascade
作者:Daniel J. Tao、Yuriy Slutskyy、Mikko Muuronen、Alexander Le、Philipp Kohler、Larry E. Overman
DOI:10.1021/jacs.7b13799
日期:2018.2.28
The first total synthesis of a chromodorolide marine diterpenoid is described. The core of the diterpenoid is constructed by a bimolecular radical addition/cyclization/fragmentation cascade that unites two complex fragments and forms two C-C bonds and four contiguous stereogenic centers of (-)-chromodorolide B in a single step. This coupling step is initiated by visible-light photocatalytic fragmentation
描述了 chromodorolide 海洋二萜的首次全合成。二萜的核心是通过双分子自由基加成/环化/断裂级联反应构建的,该级联反应将两个复杂片段结合在一起,并在一个步骤中形成两个 CC 键和 (-)-chromodorolide B 的四个连续立体中心。该偶联步骤由氧化还原活性酯的可见光光催化裂解引发,可在铱或不太贵的富电子二氰基苯光催化剂存在下完成,并使用等摩尔量的两个加成物。计算研究指导了合成的这一核心步骤的发展,并提供了对观察到的立体选择性起源的深入了解。
Formation of vinyl halides from vinyl cations generated by acetylenic participation in biomimetic polyene cyclizations
作者:William S. Johnson、Carl E. Ward、Sharon G. Boots、Michael B. Gravestock、Ronald L. Markezich、Brian E. McCarry、Dominic A. Okorie、Ronald J. Parry