A Heterogeneous Gold(I)-Catalyzed [2 + 2 + 1] Annulation of Terminal Alkynes, Nitriles, and Oxygen Atoms Leading to 2,5-Disubstituted Oxazoles
作者:Weisen Yang、Rongli Zhang、Feiyan Yi、Mingzhong Cai
DOI:10.1021/acs.joc.7b00386
日期:2017.5.19
heterogeneous gold(I)-catalyzed [2 + 2 + 1] annulation of terminalalkynes, nitriles, and oxygen atoms has been achieved by using an MCM-41-immobilized phosphine–gold(I) complex as catalyst and 8-methylquinoline N-oxide as oxidant under mild conditions, yielding a variety of 2,5-disubstituted oxazoles in good to excellent yields with broad substrate scope. The new heterogeneous gold(I) catalyst can