Rapid progress in cross-coupling reactions of unactivated substrates catalyzed by metal complexes has transformed the chemical market-place through introduction of an extensive library of achiral and chiral phosphine ligands.
ROMP has become an important reaction for the formation of well defined polymers. Ziegler and Natta's early studies on ethylene and polypropylene polymerization lead to extensive research efforts on the investigation of transition metal catalyzed polymerization and its mechanism, which
Echavarren and co-workers have also demonstrated the utility of Au-NHCs in the reactions of 1,6-enynes. They determined that the outcome of the cyclization of 1,6-enyne 1 was dependent on the ligand coordinated to the metal. When 2 was used in