Process for the preparation of a substituted 2-amino-1-sulphonaphthalene

US5502173A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Ja/ ger · Leverkusen, DE
• Siegbert Arnold · Bonn, DE
• Richard Sommer

Key dates

• Filing date: Sep 27, 1994
• Grant date: Mar 26, 1996
• Expiry date: Sep 27, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09B62/028
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2,4,6-trifluoro-5-chloro-pyrimidine and the aqueous solution of a salt of 2-amino-5-aminomethyl-naphthalene-1-sulphonic acid are simultaneously metered into a reactor in approximately equimolar amounts and afford a valuable intermediate for the preparation of high-purity dyes.