名称:
Heck Reactions in 2,6-Diaryl-3,5-dibromo-4-pyrones in the Presence of N,N’-Dibutylbenzimidazolium Bromide
摘要:
Synthesis of two 2,6-diaryl-3,5-dibromo-4-pyrone derivatives is described, by using of NBS/DMF bromination of related 2,6-diaryl-4-pyrones. PdCl(2) catalyzed Heck coupling reactions of these dibromides, with emphasis on the use of N,N'-dibutylbenzimidazol-2-ylidene as ligand, resulted in the formation of two class of mono- and di-vinylated products.