title: Ultrasonic activation of Heck type reactions in the presence of Aliquat-336.
abstract: Without phosphine and base, palladium catalysts such as PdCl(2), Pd(OAc)(2) and PdCl(2)(PhCN)(2) in water/DMF mixtures with Aliquat-336 proved to be excellent catalytic systems for Heck reactions involving several aryl bromides with styrene and acrylic compounds. Yields are remarkably improved under ultrasonic irradiation and the products show a high purity.
authors.affiliation: Physical Organic Chemistry Laboratory, Science Faculty of Sfax, 3018 Sfax, Tunisia. said_khemais@yahoo.fr
authors.forename: Khemaïs
authors.initials: K
authors.lastname: Saïd
authors.forename: Younes
authors.initials: Y
authors.lastname: Moussaoui
authors.forename: Majed
authors.initials: M
authors.lastname: Kammoun
authors.forename: Ridha
authors.initials: R
authors.lastname: Ben Salem
mesh_terms: D002384:Catalysis; D004126:Dimethylformamide / Q000737:chemistry; D006842:Hydrocarbons, Brominated / Q000737:chemistry; D009942:Organometallic Compounds / Q000737:chemistry; D010165:Palladium / Q000737:chemistry; D000644:Quaternary Ammonium Compounds / Q000737:chemistry*; D013267:Stilbenes / Q000138:chemical synthesis* / Q000737:chemistry; D020058:Styrene / Q000737:chemistry; D014465:Ultrasonics; D014867:Water / Q000737:chemistry
chemical_list: D006842:Hydrocarbons, Brominated; D009942:Organometallic Compounds; D000644:Quaternary Ammonium Compounds; D013267:Stilbenes; D014867:Water; D020058:Styrene; C037759:trioctylmethylammonium; D010165:Palladium; D004126:Dimethylformamide