Synthesis and catalytic properties of W(OAr)2Cl2(CHCMe3)(OR2) and W(OAr)2Cl(CHCMe3)(CH2CMe3)(OR2)(Ar = 2,6-disubstituted phenyl; R = Et or Pri), new uni-component catalysts for metathesis of acyclic and cyclic olefins, with or without functional groups
Abstract
The synthesis of W(OAr)2Cl(CHR)(CH2R1)(OR22)(Ar = 2,6-disubstituted phenyl; R2= Et or Pri) illustrates one of the first examples of a well defined, Lewis acid free, homogeneous olefin metathesis catalyst, for which the activity and stereoselectivity can be governed by the nature of the aryloxide ligands and of the co-ordinated ether and which shows a wide range of potential applications.