Reactions of Azulene and 2-Aminoazulene Derivatives with Isocyanates, Ketenes and Nitrile Oxides
Abstract
Azulene reacted with heterocumulenes in the presence of Lewis acid to give 1-substituted azulenes whereas 2-aminoazulenes reacted with heterocumulenes to give 2-(substituted amino)azulenes together with 1-substituted azulenes.