Synthesis of 1-(2-sulfoethyl)-pyridinium betaine

US6403800B1 · kind B1 · utility

Assignee

• BASF SE

Inventors

• Elisabeth Kappes · Schifferstadt, DE
• Gregor Brodt · Heppenheim, DE
• Rudi Kroner · Mannheim, DE
• Norbert Wagner · Heusenstamm, DE
• Soren Hildebrandt · Speyer, DE
• Thomas Bogenstätter · Bad Dürkheim, DE

Key dates

• Filing date: Aug 11, 2000
• Grant date: Jun 11, 2002
• Expiry date: Aug 11, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07B45/02
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Described is a process for preparing 1-(2-sulfoethyl)pyridinium betaine wherein pyridine is reacted with a sulfoethylating agent from the group consisting of carbyl sulfate, ethionic acid and its salt and vinylsulfonic acid and vinylsulfonate, the reaction taking place in aqueous solution or in pyridine.