Facile Synthesis of Bis(arylmethylidene)cycloalkanones Mediated by Lithium Perchlorate under Solvent-Free Conditions

Lithium perchlorate-mediated double crossed aldol condensations of a variety of aromatic aldehydes with cycloalkanones at room temperature in the presence of (trimethylsilyl)diethylamine and under solvent-free conditions are described. High to excellent yields of bis(arylmethylidene)cyclohexanones and bis(arylmethylidene)cyclopentanones are achieved within a few minutes in this facile one-pot procedure