Patent · US Expired

Para-nitrobenzotribromide process

US3993704A · kind A · utility

4Cited by

1References

7Claims

0Family size

Assignee

E.I. DU PONT DE NEMOURS AND COMPANY · US

Inventors

Frank D. Marsh · Wilmington, US
Colin McIntosh · Newark, US

Key dates

Filing date	Dec 22, 1975
Grant date	Nov 23, 1976
Priority date	—
Expiry date	Dec 22, 1995

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C205/11
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The conversion of p-nitrobenzal bromide to p-nitrobenzotribromide, an intermediate in the preparation of the insecticide, 1,5-bis(4-trifluoromethylphenyl)-3-cyanoformazan, by reacting p-nitrobenzal bromide with an alkali or alkaline earth metal hypobromite is improved by carrying out the reaction in a two-phase, water-organic solvent system.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.