Domino Knoevenagel Condensation/Intramolecular Aldol Cyclization Route to Diverse Indolizines with Densely Functionalized Pyridine Units
作者:Myungock Kim、Youngeun Jung、Ikyon Kim
DOI:10.1021/jo401801j
日期:2013.10.18
A highly efficient [4 + 2] annulation route to polysubstituted indolizines is described employing a domino Knoevenagel condensation/intramolecular aldol cyclization process as a key step. Construction of pyridine rings in indolizine skeleton was rapidly achieved from several pyrrole-2-carboxaldehydes in good to excellent yields, leading to indolizines with various substituents at the 5, 6, and 7 positions