Targeting an Achilles heel in olefin metathesis: A strategy for high-yield synthesis of second-generation Grubbs methylidene catalysts†
Abstract
The first clean, high-yield route is presented to methylidenes RuCl2(L)(PCy3)(CH2) (L = H2IMes or IMes), key vectors for catalysis and deactivation in many olefin metathesis reactions. (H2IMes = N,N′-bis(mesityl)imidazolin-2-ylidene; IMes = N,N′-bis(mesityl)imidazol-2-ylidene).