Acid Catalyzed Ring Transformation of Benzofurans to Tri- and Tetrasubstituted Furans
作者:Seema Dhiman、S. S. V. Ramasastry
DOI:10.1021/jo4018233
日期:2013.10.18
catalyzed benzofuran ringopening and furanringclosure sequence for the formation of tri- and tetrasubstituted furans is presented. Benzofuranyl carbinols and 1,3-dicarbonyls in the presence of a catalytic amount of an acid generated functionalized, polysubstituted furans in good to excellent yields via an unusual benzofuran ringopening and furanrecyclization process. This reaction is found to be general
polysubstituted furans were synthesized from furan derivatives involving copper-catalyzed ringopening of the furanring. This synthetic method possesses the advantages of readily available starting materials, mild reaction conditions, and short steps. A range of polysubstituted furans were synthesized from furan derivatives involving copper-catalyzed ringopening of the furanring. This synthetic