Patent Number: 7,087,791

Title: Catalysed acylation of alkylated benzene derivatives

Abstract: An ecofriendly process for acylation of an alkylated benzene derivative has increased selectively towards para position and comprises a step of reacting the alkylated benzene derivative with an acylating agent in the presence of nitrobenzene, dichlorobenze, dimethylsulfolane, and/or benzotrile, and a crystalline alumino silicate catalyst having general formula M.sub.2/nO.Al.sub.2O.sub.3.xSiO.sub.2.wH.sub.2O, wherein M is an alkali cation, a rare earth cation, and/or a proton, wherein the Si/Al ratio is in the range of 5.5 to 20, wherein the step of reacting is performed at temperature between 80.degree. to 140.degree. C. for 5 to 25 hours. In a further step, the solid catalyst is separated from the reaction mixture of step, and in yet another step, the acylated alkyl benzene derivative is separated from the mixture.

Inventors: Jasra; Raksh Vir (Gujarat, IN), Tyagi; Beena (Gujarat, IN), Badheka; Yogiraj Mansukhlal (Gujarat, IN)

Assignee: Council of Scientific and Industrial Reasearch

International Classification: C07C 45/00 (20060101)

Expiration Date: 8/08/02018