Using the Pummerer Cyclization−Deprotonation−Cycloaddition Cascade of Imidosulfoxides for Alkaloid Synthesis
作者:Albert Padwa、Todd M. Heidelbaugh、Jeffrey T. Kuethe
DOI:10.1021/jo9915729
日期:2000.4.1
opening and formation of a 5-acetoxy-substituted 2(1H)-pyridone. This six-ring heterocyclic system constitutes a valuable building block for the synthesis of a variety of pyridine, quinolizidine, and clavine alkaloids. The cyclization-deprotonation-cycloaddition cascade has been successfully applied to the synthesis of the naturally occurring alkaloids onychnine, dielsiquinone, (+/-)-lupinine, (+/-)-anagyrine