Increased Efficiency in Cross-Metathesis Reactions of Sterically Hindered Olefins
作者:Ian C. Stewart、Christopher J. Douglas、Robert H. Grubbs
DOI:10.1021/ol702624n
日期:2008.2.1
Efficiency in olefin cross-metathesis reactions is affected upon reducing the steric bulk of N-heterocyclic carbene ligands of ruthenium-based catalysts. For the formation of disubstituted olefins containing one or more allylic substituents, the catalyst bearing N-tolyl groups is more efficient than the corresponding N-mesityl catalyst. In contrast, the formation of trisubstituted olefins is more efficient