One solvent process for preparation of esters of 3,5-dibromo-4-h

Details One solvent process for preparation of esters of 3,5-dibromo-4-h One solvent process for preparation of esters of 3,5-dibromo-4-h

1982-09-29

1984-03-27

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260465D, 260465F, C07C12175

Patent

active

044393687

ABSTRACT:
Esters of 3,5-dibromo-4-hydroxybenzonitrile can be prepared in high yields from 4-cyanophenol in a single solvent. In this manner, the 3,5-dibromo-4-hydroxybenzonitrile intermediate need not be isolated, and therefore the bromination and esterification reactions can be performed in one reactor. Preferably, the bromination is accomplished with bromine chloride in the presence of 1,1,2-trichloroethane followed by esterification with an acid chloride in the same solvent.

REFERENCES:
patent: 3349111 (1967-10-01), Luckenbaugh
patent: 3397054 (1968-08-01), Hart et al.
patent: 3592626 (1971-07-01), Heywood et al.
patent: 3671556 (1972-06-01), Goldstick
patent: 4332613 (1982-06-01), Esposito
patent: 4349488 (1982-09-01), Dentel et al.
Mills et al., Ind. Eng. Chem. Prod. Res. Develop., vol. 12, No. 3, 1973.
Britton et al., Chemical Abstracts, vol. 47, p. 5437, 1953.

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