Search

[image omitted] The article describes an efficient, economical, and environmentally friendly approach for Michael addition of diethyl malonate to ferrocenyl substituted chalcones in the presence of microwave irradiation under solvent-free conditions, affording the corresponding Michael adducts in moderate to good yields of 53-94%. [ABSTRACT FROM AUTHOR]

Abstract: A facile Michael addition of ferrocenylenones with aliphatic amines under ultrasound irradiation in the absence of solvent and catalyst at room temperature can afford 1-ferrocenyl-3-amino carbonyl compounds rapidly in high yields, which is also efficient in the aza-Michael reaction of other α,β-unsaturated carbonyl compounds such as chalcone, carboxylic ester, etc. However, aromatic amines do not undergo the conjugate addition at all, and the reactions under existing methods do not proceed or take place in low yield after a long reaction time. Apart from experimental simplicity, generality and selectivity, the advantages of this methodology are the rapid, environmentally benign and less expensive processes, which will contribute to the progress of green chemistry. [Copyright &y& Elsevier]

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, α,β-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]

This paper described alkynylation of ethynylbenzene to ketones catalyzed by potassium tert-butoxide under solvent-free conditions in the presence of ultrasound irradiation. [Copyright &y& Elsevier]