Process for the preparation of certain nuclear chlorinated benzo

Details Process for the preparation of certain nuclear chlorinated benzo Process for the preparation of certain nuclear chlorinated benzo

1978-07-17

1980-03-04

Davis, C.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260651R, C07C 2508, C07C 2516

Patent

active

041917111

ABSTRACT:
A process for the preparation of 3,4-dichlorobenzotrichloride, 3,4,5-trichlorobenzotrichloride, 2,4,5-trichlorobenzotrichloride or 2,3,4,5-tetrachlorobenzotrichloride which comprises contacting p-chlorobenzotrichloride of the formula ##STR1## with chlorine or an agent which releases chlorine at a temperature between 0.degree. C. and 180.degree. C. in the presence of an iron (III) chloride or aluminum chloride catalyst or a mixture of iron (III) chloride or aluminum chloride with sulfur dichloride or disulfur dichloride.

REFERENCES:
patent: 2608591 (1952-08-01), Lawler
patent: 2956084 (1960-10-01), Enz et al.
patent: 3219688 (1965-11-01), Weil et al.

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