Patent · US Expired

Process for the preparation of salts of 1-substituted 2,4-diaminobenzenes

US6204413A · kind A · utility

0Cited by

8References

12Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Lars Rodefeld · Leverkusen, DE
Alexander Klausener · Neunburg vorm Wald, DE
Horst Behre · Odenthal, DE

Key dates

Filing date	Apr 11, 2000
Grant date	Mar 20, 2001
Priority date	—
Expiry date	Apr 11, 2020

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C213/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to a process for the preparation of specific salts of 1-substituted 2,4-diaminobenzenes by catalytic hydrogenation of 1-substituted 2,4-dinitrobenzenes and addition of the reaction product obtained after the hydrogenation and separated from the catalyst to an aqueous solution of an acid.

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