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