H‐Bonded Counterion‐Directed Catalysis: Enantioselective Gold(I)‐Catalyzed Addition to 2‐Alkynyl Enones as a Case Study
作者:Àlex Martí、Marc Montesinos‐Magraner、Antonio M. Echavarren、Allegra Franchino
DOI:10.1002/ejoc.202200518
日期:2022.10.13
H-bonded counterion-directed catalysis has been applied to the enantioselective tandem cycloisomerization-addition to 2-alkynyl enones. The addition of C-, N- or O-centered nucleophiles catalyzed by a phosphinosquaramide Au(I) chloride/chiral Ag(I) phosphoramidate system afforded bicyclic furans in moderate to excellent yield and enantioselectivity (28 examples, 59–96 % yield, 62 : 38 to 95 : 5 er)