Cyclodimerization of Alkynes with Phosphine-Free Ruthenium Carbene Complexes: Carbene Consumption by a Shunted Alkyne Oligomerization
作者:Steven T. Diver、Amol A. Kulkarni、Daniel A. Clark、Brian P. Peppers
DOI:10.1021/ja0705689
日期:2007.5.1
A new cyclodimerization of ruthenium carbenes and alkynes is reported. The cyclodimerization produces substituted cyclopentadienes and consumes the carbene complex. Cyclodimerization of alkynes is predominant at low alkene concentrations and was found to be competitive with enyne metathesis. The presence of the ortho alkyl ether in the ruthenium carbene complex appears to be a critical determinant