Preparation of 2(5H)-furanones

US4853473A · kind A · utility

Assignee

• BASF SE

Inventors

• Rolf Fischer · Heidelberg, DE
• Juergen Frank · Ludwigshafen, DE
• Franz Merger · Bischofswerda, DE
• Michael Roeper · Monsheim, DE
• Uwe Vagt · Speyer, DE

Key dates

• Filing date: Jun 1, 1988
• Grant date: Aug 1, 1989
• Expiry date: Jun 1, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D315/00
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2(5H)-furanones I ##STR1## where R.sup.1 and R.sup.2 are each hydrogen, C.sub.1 -C.sub.6 -alkyl, C.sub.5 - or C.sub.6 -cycloalkyl, C.sub.7 -C.sub.12 -aralkyl or aryl, are prepared by heating a 3-formylcarboxylate or 3-formylcarboxylic acid II ##STR2## where R.sup.3 is hydrogen, C.sub.1 -C.sub.12 -alkyl, C.sub.5 - or C.sub.6 -cycloalkyl, C.sub.7 -C.sub.12 -aralkyl or aryl, to 100.degree.-450.degree. C. in the presence of an acidic catalyst.