Base-Catalyzed Highly Stereoselective Conversion of γ-Hydroxy-α,β-acetylenic Esters to γ-Acetoxy Dienoates
作者:Yang Yue、Xiao-Qi Yu、Lin Pu
DOI:10.1002/chem.200802355
日期:2009.5.11
A convenient route with high stereo control to γ‐acetoxy dienoates is provided by the reaction of methyl propiolate with aldehydes in the presence of ZnEt2 and N‐methylimidazole at room temperature, followed by the catalytic conversion of the resulting γ‐hydroxy‐α,β‐acetylenic esters with p‐N,N‐dimethylaminopyridine (DMAP) in acetic anhydride (see scheme).