| abstract |
Process for the preparation of benzyl ketones of the general formula I in which R¹ is optionally substituted by cycloalkyl or aryl, C₁-C₈-alkyl and R² and R³ is halogen, C₁-C₄-alkyl, hydroxyl, C₁-C₄-alkoxi or C₂-C₄-methylenedioxi by using glycol monoethers of the general formula II in which R¹, R² and R³ have the meanings given above and in which R⁴ is C₁-C₈-alkyl, in the presence of silicon dioxide, phosphates or zeolites at temperatures of 50 to 500⁰C and pressures of 0.01 to 50 bar. |