Cross-Coupling Catalysis and Related Reactions

In spite of the ubiquitous use of phosphines and the more recent and intensively explored NHCs as spectator hgands in homogeneous catalysis, it seems surprising that their hybrid bidentate or tridentate systems have evolved relatively late into 

To date, most research on NHCP transition-metal catalysis has been devoted to cross-couplings [13] or related reactions such as hydroarylation of alkenes [18], direct arylation of alkynes [17], or oxidative homocoupling of terminal alkynes [19]. All NHCP systems used in these studies feature one or two 

The closely related benzimidazolylidene hgands R-3 (R = Et, -Pr, -Bu) and the pincer 11 introduced by Hahn et cd. were tested in the Heck coupling of activated 

Entry Catalyst Pd Conditions Time R YieldW TON TOF References 

Entry Catalyst Pd (mol%) Conditions Time (h) X R YieldW TON (%) TOP (h-b References 

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