Lewis Acid Catalyzed Electrophilic Substitution of Indole with Aldehydes and Schiff's Bases Under Microwave Solvent‐Free Irradiation

Abstract Bis(indolyl)methane derivatives can be rapidly and smoothly prepared in good yields under solvent‐free microwave irradiation, though Lewis acid catalyzed electrophilic substitution of indoles with aldehydes and Schiff's bases of aryldehydes.