A simple and efficient method for homocoupling of cycloketones and acetone is described. 2-(1-Cyclohexenyl)- cyclohexanone (1), bicyclopentyliden-2-one (2) and 4-methyl-3-penten-2-one (3) were synthesized from cyclohexanone, cyclopentanone and acetone respectively, in the presence of thionyl chloride in anhydrous ethanol.