An efficient synthesis of ferrocenyl substituted 1,5-diketone and cyclic <f>α,β</f>-unsaturated ketones under ultrasound irradiation

Michael reactions of deoxybenzoin or dibenzyl ketone with ferrocenyl substituted chalcones catalyzed by sodium hydroxide under ultrasound irradiation can afford the corresponding Michael adducts with excellent yields. It presents a convenient, efficient and simple method for the preparation of ferrocenyl substituted 1,5-diketone compounds in the presence of ultrasound irradiation. In addition, the formation of cyclic, <f>α,β</f>-unsaturated ketones via the reactions of dibenzyl ketone with ferrocenyl substituted chalcones were found, and characterized by X-ray crystal structure analysis. [Copyright &y& Elsevier]