Silver(I)-Catalyzed Aminocyclization of 2,3-Butadienyl and 3,4-Pentadienyl Carbamates: An Efficient and Stereoselective Synthesis of 4-Vinyl-2-oxazolidinones and 4-Vinyltetrahydro-2H-1,3-oxazin-2-ones
Use of a New Spirophosphine To Achieve Catalytic Enantioselective [4 + 1] Annulations of Amines with Allenes To Generate Dihydropyrroles
作者:Søren Kramer、Gregory C. Fu
DOI:10.1021/jacs.5b01944
日期:2015.3.25
Due in part to the common occurrence of five-membered nitrogenheterocycles in bioactive molecules, the discovery of methods for the enantioselective synthesis of such structures is a useful endeavor. Building on a single example by Tong of a phosphine-catalyzed [4 + 1] annulation of an amine with an allene that furnished an achiral dihydropyrrole in 22% yield, we have developed, with the aid of a