Regiodivergent heterocyclization: a strategy for the synthesis of substituted pyrroles and furans using α-formyl ketene dithioacetals as common precursors
作者:Ting Wu、Ling Pan、Xianxiu Xu、Qun Liu
DOI:10.1039/c3cc48546c
日期:——
challenging task. We report here that 5-alkylthio-pyrroles, 4-alkylthiocarbonyl-pyrroles and 2-alkylthio-4-tosyl-furans can be prepared, selectively, in a single operation using the readily available alpha-formyl ketene dithioacetals as common precursors, through their regiodivergent heterocyclization with alpha-acidic isocyanides controlled by the choice of suitable catalysts/promoters.