Ahmad Reza Moosavi-Zare - Sayyed Jamaleddin Asadabadi University, Asadabad, ۶۵۴۱۸۶۱۸۴۱, I. R. Iran
Mohammad Ali Zolfigol - Faculty of Chemistry, Bu-Ali Sina University, Hamedan, ۶۵۱۷۸۳۸۶۸۳, Iran
Zahir Rezanejad - Faculty of Chemistry, Bu-Ali Sina University, Hamedan, ۶۵۱۷۸۳۸۶۸۳, Iran

In this study, condensation reaction of the aldehydes with various ketones in the presence of sulfonic acid functionalized pyridinium chloride [pyridine–SO3H]Cl as an ionic liquid and catalyst were carried out to prepare the α,αʹ- bis(arylidene)cycloalkanone under the solvent free conditions. The purity and yield of the products were high and their identification was performed by the spectroscopic analysis and comparison of the physical information with known compounds in the previous literature.

Sulfonic acid functionalized pyridinium chloride, cross-aldol condensation, α, αʹ- bis(arylidene)cycloalkanone, Solvent-free