Other Ruthenium-catalyzed Reactions Featuring NHCs

2 Other Ruthenium-catalyzed Reactions Featuring NHCs 

Arisawa and Nishida showed that treating the Grubbs II catalyst with silyl enol ethers produced a catalyst capable of cycloisomerizing A-allyl-o-vinylaniline 

Similar behavior was observed with [cw-(IMes)RhCl(P( -tolyl)3)2], which exchanged the phosphine trans to IMes an order of magnitude more slowly than in the homoleptic complex [RhCl(P(p-tolyl)3)3], resulting in poorer hydrogenation efficiency with the NHC complex. The dissociative mechanism suggested by these observations was further corroborated by catalytic results obtained using CuCl (an effective phosphine sponge) as an additive. 

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