Process for the manufacture of 4,5-dichloro-2-(4-chlorophenoxy)p

Details Process for the manufacture of 4,5-dichloro-2-(4-chlorophenoxy)p Process for the manufacture of 4,5-dichloro-2-(4-chlorophenoxy)p

1979-11-09

1981-08-18

Helfin, Bernard

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 4122

Patent

active

042848288

ABSTRACT:
A process for the manufacture of 4,5-dichloro-2-(4-chlorophenoxy)phenol by selective chlorination of 2-phenoxyanisole with 3 to 5 molar equivalents of chlorine, in the temperature range between -10.degree. and +50.degree. C., preferably between 0.degree. and 30.degree. C., in a lower halogenated aliphatic hydrocarbon, a lower aliphatic nitrile, in dimethyl formamide, dimethylmethanephosphonate or methanol, preferably in dimethyl formamide, dimethylmethanephosphonate, methanol, acetonitrile, propionitrile, chloroform, methylene chloride, 1,2-dichloroethane or tetrachloroethane, and demethylation of the 4,5-dichloro-2-(4-chlorophenoxy)anisole obtained as intermediate with an acid.

REFERENCES:
patent: 3506720 (1970-04-01), Model et al.
patent: 3904696 (1975-09-01), Model et al.

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