A new approach to carbon–carbon bond formation: development of aerobic Pd-catalyzed reductive coupling reactions of organometallic reagents and styrenes
作者:Keith M. Gligorich、Yasumasa Iwai、Sarah A. Cummings、Matthew S. Sigman
DOI:10.1016/j.tet.2009.03.096
日期:2009.6
Alkenes are attractive starting materials for organic synthesis and the development of new selective functionalization reactions is desired. Previously, our laboratory discovered a unique Pd-catalyzed hydroalkoxylation reaction of styrenes containing a phenol. Based upon deuterium labeling experiments, a mechanism involving an aerobicalcoholoxidationcoupled to alkene functionalization was proposed
A Highly Selective and General Palladium Catalyst for the Oxidative Heck Reaction of Electronically Nonbiased Olefins
作者:Erik W. Werner、Matthew S. Sigman
DOI:10.1021/ja1060998
日期:2010.10.13
A general, highly selective oxidative Heck reaction is reported. The reaction is high-yielding under mild conditions without the need for base or high temperatures, and the selectivity is excellent, without the requirement for electronically biased olefins or other specific directing groups. A preliminary mechanistic investigation suggests that the unusually high selectivity may be due to the catalyst's sensitivity to C-H bond strength in the selectivity-determining beta-hydride elimination step.