Lewis Acid Catalyzed Dipolar Cycloadditions of an Activated Imidate
作者:Roy K. Bowman、Jeffrey S. Johnson
DOI:10.1021/jo0485536
日期:2004.11.1
simple Lewisacids revealed that N-malonylimidates undergo catalyzed [3+2] cycloadditionreactions with aldehydes, imines, and activated olefins to form oxazolines, imidazolines, and pyrrolines, respectively. Reactions proceed optimally at ambient temperature with the addition of 5 mol % of MgCl2 in CH3CN. Experiments aimed at elucidation of the reactive intermediate undergoing cycloaddition suggest