Iodine-Mediated Neighboring Group Assisted Synthesis of Unsymmetrical 1,2-Diketone/Benzil Derivatives from o-(Alkynyl)benzamides
作者:K. Majumdar、Inul Ansary、Rajendra De、B. Roy
DOI:10.1055/s-0030-1260155
日期:2011.9
A facile synthesis of 1,2-diketone derivatives have been achieved fromo-(alk-1-ynyl)benzamide derivatives in good to excellent yields by molecular iodine-catalyzed electrophilic reaction. The reaction proceeds via formation of an (isochromenylidene)benzenaminium intermediate formed by the intramolecular neighboring group assistance of the ortho-amide group. molecular iodine - o-(alkynyl)benzamides