title: Improved synthesis of 2,2'-arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) derivatives catalyzed by urea under ultrasound.
abstract: Synthesis of 2,2'-arylmethylene bis(3-hydroxy-5,5-dimethyl-2-cyclohexene-1-one) derivatives catalyzed by urea via the condensation of aromatic aldehydes and 5,5-dimethyl-1,3-cyclohexanedione was carried out in 80-98% yields at 50 °C in aqueous media under ultrasound. This method provides several advantages such as environment friendliness, high yields and simple work-up procedure.
authors.affiliation: College of Chemistry and Environmental Science, Hebei University, Baoding 071002, PR China. lijitai@hbu.cn
authors.forename: Ji-Tai
authors.initials: JT
authors.lastname: Li
authors.forename: Yan-Wei
authors.initials: YW
authors.lastname: Li
authors.forename: Ya-Li
authors.initials: YL
authors.lastname: Song
authors.forename: Guo-Feng
authors.initials: GF
authors.lastname: Chen
mesh_terms: D000447:Aldehydes / Q000737:chemistry; D002384:Catalysis; D003512:Cyclohexanones / Q000138:chemical synthesis* / Q000737:chemistry; D015394:Molecular Structure; D014465:Ultrasonics; D014508:Urea / Q000737:chemistry*
chemical_list: D000447:Aldehydes; D003512:Cyclohexanones; C028215:2-cyclohexen-1-one; C004636:1,3-cyclohexanedione; D014508:Urea