Process for directed chlorination of alkylbenzenes

Details Process for directed chlorination of alkylbenzenes Process for directed chlorination of alkylbenzenes

C - Chemistry, Metallurgy

07

C

260/653.5

C07C 25/02 (2006.01) B01J 31/02 (2006.01) C07C 17/12 (2006.01)

Patent

CA 1069941

PROCESS FOR DIRECTED CHLORINATION OF ALKYLBENZENES ABSTRACT A process for the production of nuclear chlorinated alkyl- benzenes comprises reacting, in the liquid phase, an alkylbenzene with chlorine in the presence of a Lewis acid catalyst and a co- catalyst comprising a thianthrene compound or mixture of thianthrene compounds characterized by the formula: Image where each n is 0 to 1, and each x is hydrogen or an electron-withdrawing substituent with the proviso that at least one x is an electron withdrawing substituent. The monochlorinated alkylbenzene products prepared in this manner are characterized by a desirably low ratio of ortho to para isomer.

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