Cobalt-Catalyzed Cross-Couplings between Alkenyl Acetates and Aryl or Alkenyl Zinc Pivalates

摘要

CoBr2 (5mol%) in the presence of 2,2-bipyridyl (5 mol%) enables electrophilic alkenylations between easily accessible alkenyl acetates or tosylates and various functionalized aryl zinc pivalates at ambient temperature. This cobalt-catalyzed process was further applicable to alkenyl zinc pivalates to provide substituted 1,3-dienes.