Process for the preparation of beta-hydroxyalkypicolinium salts

US5840902A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Karlheinrich Meisel · Odenthal, DE
• Klaus Walz
• Gerd-Friedrich Renner · Lingen (Ems), DE
• Hans Schulze · Cologne, DE
• Carsten Gerdes · Leverkusen, DE
• Karl-Rudolf Gassen · Odenthal, DE
• Reiner Ditzer · Cologne, DE
• Lothar Klein · Leverkusen, DE

Key dates

• Filing date: Nov 20, 1996
• Grant date: Nov 24, 1998
• Expiry date: Nov 20, 2016

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D213/57
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

.beta.-Hydroxyalkylpicolinium salts of the formula (I) ##STR1## wherein A, R.sup.1 to R.sup.3 and X have the meanings given in the description, which are obtained by reaction of picolines of the formula (II) ##STR2## with alkylene oxides of the formula (III) in the presence of a 1- to 3-basic acid and in water or an organic solvent as the reaction medium and are used as intermediate products for the preparation of cationic dyestuffs, and dyestuff preparations comprising such cationic dyestuffs.