Base-mediated regiospecific cascade synthesis of N-(2-pyridyl)pyrroles from N-propargylic β-enaminones
作者:Jinhai Shen、Xifa Yang、Fuyuan Wang、Yue Wang、Guolin Cheng、Xiuling Cui
DOI:10.1039/c6ra08987a
日期:——
A KOH-promoted regiospecificsynthesis of polysubstituted N-(2-pyridyl)pyrroles under transition metal-free conditions has been developed. The pyrrole and pyridine rings were simultaneously installed from acyclic enaminone precursors under mild conditions and generated 1 equiv. of H2O as the sole byproduct. A series of polysubstituted N-(2-pyridyl)pyrroles were provided in up to 91% yield for 21 examples
A novel protocol to prepare multi-substituted dihydrofuropyridine and dihydropyrrolopyridine derivatives from KOH-catalyzed reactions between readily available N-propargylic β-enaminones and arylaldehydes or N-sulfonyl imines has been developed.