Cobalt-mediated cycloisomerization of δ-substituted ε-acetylenic β-ketoesters construction of angular triquinane by a sequence ene/Pauson-Khand reactions
作者:Jean-Luc Renaud、Corinne Aubert、Max Malacria
DOI:10.1016/s0040-4020(99)00172-6
日期:1999.4
The preparation of δ-substituted ε-acetylenic β-ketoesters is fully described. Their cobalt-mediated Conia-ene reactions led to variously functionalized methylenecyclopentanes in high yields and with a moderate control of the 1,4 diastereoselectivity. A sequence involving the cobalt-mediated ene and Pauson-Khand reactions is presented and allowed the construction of the angular triquinane framework