Patent · US Expired

Process for the preparation of 6-hydroxynaphthalene-1-carboxylic from 1-aminomethylnaphthalene-6-sulphonic acid

US4874892A · kind A · utility

0Cited by

2References

6Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Erich Hammerschmidt · Bensberg, DE
Heinz U. Blank · Odenthal, DE

Key dates

Filing date	Jul 18, 1988
Grant date	Oct 17, 1989
Priority date	—
Expiry date	Jul 18, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07C309/47
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The invention relates to the new compound 1-aminomethylnaphthalene-6-sulphonic acid, a process for its preparation by amidoalkylation of naphthalene-2-sulphonic acid and hydrolysis of the amidoalkylation product, and its use as an intermediate product for the preparation of 6-hydroxynaphthalene-1-carboxylic acid.

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