Synthesis of 5-Azaindolizine Derivatives by the Palladium-Catalyzed Intermolecular Formal [3+2] Cycloaddition of Alkylidenecyclopropanes with 1,2-Diazines
作者:Amal I. Siriwardana、Itaru Nakamura、Yoshinori Yamamoto
DOI:10.1021/jo035810i
日期:2004.4.1
The palladium-catalyzed formal [3+2] cycloaddition reaction of alkylidenecyclopropanes with 1,2-diazines proceeded smoothly to give the corresponding 5-azaindolizine derivatives in good to allowable yields. For example, in the presence of 5 mol % of Pd(PPh3)4, the reaction of 1-propylhexylidenecyclopropane with phthalazine or with pyridazine proceeded at 120 °C without solvent, and the corresponding