Process for preparing crystalline salts of acetoacetamide-N-sulfofluoride

US4618455A · kind A · utility

Assignee

• Hoechst GmbH · DE

Inventors

• Adolf Linkies · Frankfurt, DE
• Dieter Reuschling · Rockenberg, DE

Key dates

• Filing date: Mar 19, 1985
• Grant date: Oct 21, 1986
• Expiry date: Mar 19, 2005

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D291/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Crystalline salts of acetoacetamide-N-sulfofluoride are prepared by reacting amidosulfofluoride H.sub.2 NSO.sub.2 F with diketene in the presence of inorganic bases, preferably alkali metal carbonates and/or hydrogencarbonates, in particular potassium carbonate, in an inert organic solvent. The salts can be further processed with further base, for example with methanolic KOH, into salts of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one-2,2-dioxide; the potassium salt, in particular, is important for use as a sweetener ("Acesulfame").