Synthesis and metathesis reactions of a phosphine-free dihydroimidazole carbene ruthenium complex

Synthesis and activity in ring closure metathesis (RCM) and cross metathesis (CM) of the phosphine-free 1,3-dimesityl-4,5-dihydroimidazole-2-ylidene (IHMes) ruthenium alkoxybenzylidene complex 6 are reported. (C) 2000 Elsevier Science Ltd. All rights reserved.