Gold(I)-Catalyzed Tandem Alkoxylation/Lactonization of γ-Hydroxy-α,β-Acetylenic Esters
作者:Rubén S. Ramón、Christophe Pottier、Adrián Gómez-Suárez、Steven P. Nolan
DOI:10.1002/adsc.201100115
日期:2011.6
The formation of 4‐alkoxy‐2(5H)‐furanones was achieved via tandemalkoxylation/lactonization of γ‐hydroxy‐α,β‐acetylenic esters catalyzed by 2 mol% of [2,6‐bis(diisopropylphenyl)imidazol‐2‐ylidine]gold bis(trifluoromethanesulfonyl)imidate [Au(IPr)(NTf2)]. The economic and simple procedure was applied to a series of various secondary propargylic alcohols allowing for yields of desired product of up