Process for the preparation of sodium thiobarbiturate

US5274093A · kind A · utility

Assignee

• Huels Aktiengesellschaft · DE

Inventor

• Marcel Feld · Cologne, DE

Key dates

• Filing date: Aug 13, 1992
• Grant date: Dec 28, 1993
• Expiry date: Aug 13, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D239/68
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Sodium thiobarbiturate is prepared by reacting dimethyl malonate, thiourea and sodium methylate in methanol as the solvent at elevated temperatures, preferably at reflux temperature under atmospheric pressure.