Process for directed chlorination of alkylbenzenes

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

1975-08-01

1977-06-21

Horwitz, D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

252429R, 252429A, C07C 2504

Patent

active

040311473

ABSTRACT:
A process for the production of nuclear chlorinated alkylbenzenes 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: ##STR1## 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.

REFERENCES:
patent: 1741305 (1929-12-01), Jaeger
patent: 1946040 (1934-02-01), Stoesser et al.
patent: 3226447 (1965-12-01), Bing et al.

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