Preparation of 5-(2-halo-4-trifluoromethylphenoxy)-2-nitrobenzoi

Details Preparation of 5-(2-halo-4-trifluoromethylphenoxy)-2-nitrobenzoi Preparation of 5-(2-halo-4-trifluoromethylphenoxy)-2-nitrobenzoi

1981-11-16

1983-07-26

Reamer, James H.

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

Organic compounds

Carboxylic acids and salts thereof

560 21, 260465D, C07C 9900

Patent

active

043955703

ABSTRACT:
A process for preparing a substantially pure, isomer free 5-(2-halo-4-trifluoromethylphenoxy)-2-nitrobenzoic acid or its esters, salts and amides by the basic condensation of a 4-trifluoromethylphenol and a 1-chloro-3-substituted-4-nitrobenzene followed by halogenation. All known previous routes afforded, in addition to the desired product, a number of inactive isomers.

REFERENCES:
patent: T988010 (1979-11-01), Cunningham et al.
patent: 3686266 (1972-08-01), Krefeld et al.
patent: 3979437 (1976-09-01), Theissen
patent: 4193790 (1980-03-01), Rohr et al.
patent: 4259510 (1981-03-01), Johnson
Morrison et al., "Org. Chemistry", pp. 344-352, Allyn & Bacon (1966).

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