Process for the preparation of phenylpropanones

Details Process for the preparation of phenylpropanones Process for the preparation of phenylpropanones

C - Chemistry, Metallurgy

07

C

260/352.5, 260/5

C07C 49/255 (2006.01) B01J 31/18 (2006.01) C07C 45/28 (2006.01) C07C 45/58 (2006.01) C07D 303/22 (2006.01) C07D 317/54 (2006.01)

Patent

CA 1260487

ABSTRACT Process for the preparation of phenylpropanones having formula. Image R and/or R1, each other equal or different, being C1-C4 alkyl groups, optionally forming part of an alicyclic or heterocyclic ring, wherein the corresponding allylbenzenes are catalytically epoxidated by means of H2O2, in a biphase system comprising an aqueous phase containing H2O, an organic phase containing said allylbenzenes, a solvent immiscible in said aqueous phase and a catalyst having formula Q3XW4O24 (Q being a quaternary cation, containing hydrocarbylic groups having on the whole from 20 to 70 C atoms, and X being P or As) and wherein the thus obtained epoxides are isomerized by heating at 90°-150°C, in the presence of catalytic amounts of LiI\

520732

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