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 23/12 (2006.01) C07C 17/12 (2006.01)

Patent

CA 1109081

Case 3857 ASC/mh 12/30/76 PROCESS FOR DIRECTED CHLORINATION OF ALKYLBENZENES ABSTRACT A process for the production of nuclear chlorinated alkyl- benzenes comprises reacting, in the liquid phase, 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 n is 0 to 1, y is an electron-withdrawing substituent or an electron- donating substituent and each x is hydrogen, an electron-withdrawing substituent or an electron-donating substituent with the proviso that the total number of electron-withdrawing substituents present at the x and y positions is at least one and no more than seven; the total number of electron-donating substituents is at least one and no more than four; no more than three electron-donating substituents are present at the peri- positions; and when electron-withdrawing substituents are present at each of the peri-positions, electron-donating substituents are present at each of the 2, 3, 7 and 8 positions. - 1 -

294264

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