A new and efficient one-pot synthesis of polysubstituted pyrrole derivatives by three-component reaction between dialkyl acetylenedicarboxylates, triphenylphosphine, 2-aminopyridin derivatives in the presence of arylglyoxals is described. The reactions were performed in dichloromethane at room temperature and neutral conditions and afforded high yields of products.
The first facile and efficient acid-catalyzed three-component reaction of indoles, H-phosphine oxides and carbonyl compounds has been developed, providing a general, one-pot approach to structurally diverse C3-alkylated indole derivatives.
A Facile Synthesis of Polysubstituted Pyrroles by One-Pot Three-Component Reaction