One solvent process for preparation of esters of 3,5-...

Details One solvent process for preparation of esters of 3,5-... One solvent process for preparation of esters of 3,5-...

C - Chemistry, Metallurgy

07

C

260/427.5, 260/4

C07C 121/75 (1985.01)

Patent

CA 1208655

- 12 - 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 esterificaton with an acid chloride in the same solvent.

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