Taming furfuryl cations for the synthesis of privileged structures and novel scaffolds
作者:Seema Dhiman、S. S. V. Ramasastry
DOI:10.1039/c3ob40814k
日期:——
Furfuryl cations are generated via a highly efficient bismuth-catalyzed reaction of furfuryl alcohols. This systematic study provides insight on the reactivity profile of furfuryl cations towards nucleophilic substitution reactions. Novel C–C, C–N, C–O and C–S bond forming reactions of furfuryl cations have been developed, thus providing access to a diverse array of building blocks for further manipulations.
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