Palladium-catalyzed oxidative heterocyclodehydration-alkoxycarbonylation of 3-yne-1,2-diols: a novel and expedient approach to furan-3-carboxylic esters
作者:Bartolo Gabriele、Lucia Veltri、Raffaella Mancuso、Pierluigi Plastina、Giuseppe Salerno、Mirco Costa
DOI:10.1016/j.tetlet.2010.01.054
日期:2010.3
furan-3-carboxylic esters 2 is presented, based on palladium-catalyzeddirect oxidative carbonylation of readily available 3-yne-1,2-diols 1. The process, corresponding to a sequential combination between a 5-endo-dig heterocyclodehydration step and an oxidative alkoxycarbonylation stage, is catalyzed by PdI2 in conjunction with an excess of KI under relatively mild conditions (100 °C in ROH under 40 atm