作者:Gary H. Posner、John P. Mallamo、Alison Y. Black
DOI:10.1016/s0040-4020(01)93265-x
日期:——
A new sequence of reactions involving tandem Michael-Michael-ring closure (MIMIRC) has been developed for efficient formation of three C-C bonds in one reaction vessel. The terminal ring closure reaction proceeds via either a 1,3- or a 1,6-cyclization, and this methodology also serves for construction of quaternary C centers. The usefulness of MIMIRC reactions is demonstrated by efficient assembly
已经开发了涉及串联迈克尔-迈克尔环闭合(MIMIRC)的新反应序列,以在一个反应容器中有效形成三个CC键。末端闭环反应通过1,3-或1,6-环化进行,该方法也可用于构建四级C中心。MIMIRC反应的有用性通过有效地组装环丙基酮和反式-1-氢酮,如(±)-9,11-脱氢雌酮1b来证明。这种一锅法代表了最短的已知类固醇的会聚全合成,随后的直接转化直接导致了天然(±)-雌酮。