Versatile Synthesis of Pyrrole-2-acetic Esters and (Pyridine-2-one)-3-acetic Amides by Palladium-Catalyzed, Carbon Dioxide-Promoted Oxidative Carbonylation of (Z)-(2-En-4-ynyl)amines
The oxidative carbonylation of readily available (Z)-(2-en-4-ynyl)amines, catalyzed by the PdI2-KI system, selectively afforded in satisfactory yields (40–95 %) either pyrrole-2-acetic ester or (pyridine-2-one)-3-acetic amide derivatives, depending on the susbtitution pattern of the substrate and the reaction conditions. The presence of an excess of carbon dioxide proved in most cases to be beneficial
Unprecedented carbon dioxide effect on a Pd-catalysed oxidative carbonylation reaction: a new synthesis of pyrrole-2-acetic esters
作者:Bartolo Gabriele、Giuseppe Salerno、Alessia Fazio、Fausto Bruno Campana
DOI:10.1039/b203413a
日期:2002.6.19
It has been found that carbon dioxide effectively promotes the Pd-catalysed oxidative cyclisation–alkoxycarbonylation of (Z)-(2-en-4-ynyl)amines 1 leading to pyrrol-2-acetic esters 2.