Chromium(0)-Promoted Multicomponent Cycloaddition of Tethered Diynes with Cyclic Trienes: Application to the Total Synthesis of 9-<i>e</i><i>pi</i>-Pentalenic Acid
作者:James H. Rigby、Mundruppady S. Laxmisha、Andrew R. Hudson、Charles H. Heap、Mary Jane Heeg
DOI:10.1021/jo040204o
日期:2004.10.1
An efficient protecting group controlled regioselective chromium(0)-mediated three-component higher order cycloaddition of tethered diynes with cyclic trienes that generates five rings and six stereogenic centers in one step is described. Following a sequence of reactions featuring a chemoselective Baeyer−Villiger rearrangement and a regioselective cyclopropane hydrogenolysis, the total synthesis of