Diastereoselective synthesis of highly substituted polycyclic scaffolds via a one-pot four-step tandem catalytic process
作者:Mark W. Grafton、Stuart A. Johnson、Louis J. Farrugia、Andrew Sutherland
DOI:10.1016/j.tet.2014.06.020
日期:2014.10
A rapid and diastereoselective synthesis of highly substituted aminobicyclo[4.3.0]nonanes and bicyclo[4.4.0]decanes from alkyne derived allylic alcohols has been developed using a one-pot multi-bond forming tandem catalytic process. Overman rearrangement of the allylic trichloroacetimidates was followed by a ring closing enyne metathesis/cross metathesis sequence of reactions, in which both steps were
使用单罐多键形成串联催化方法,已经开发了从炔烃衍生的烯丙基醇中快速,非对映选择性合成高度取代的氨基双环[4.3.0]壬烷和双环[4.4.0]癸烷的方法。烯丙基三氯乙亚氨酸酯的超量重排后是反应的闭环烯炔复分解/交叉复分解序列,其中两个步骤均由Grubbs第二代催化剂催化。然后,将生成的外二烯进行氢键键合的Diels-Alder反应,形成内加成物,为单一非对映异构体。交叉易位伴侣和亲二烯体的变化允许检查这一一锅法的范围,并准备了一系列高度取代的多环支架。