Iodine as a New Catalyst for the Condensation of 2-Hydroxy-2,2′-bisindan-1,1′,3,3′-tetrone with Cyclic Enaminones: Synthesis of Spiro-dihydropyridine Derivatives under Acid-Free Conditions

Abstract

Iodine has been used as a new catalyst for the synthesis of spiro-dihydropyridine derivatives by the condensation of cyclic enaminones and 2-hydroxy-2,2′-bisindan-1,1′,3,3′-tetrone.