Process for the production of substituted furans

US4215057A · kind A · utility

Assignee

• Consortium für elektrochemische Industrie GmbH · DE

Inventors

• Rudolf Kaufmann · Burghausen, DE
• Hermann Braunling · Munich, DE
• Norman Haberle · Munich, DE
• Reinhard Muller · Baden, CH

Key dates

• Filing date: Nov 24, 1978
• Grant date: Jul 29, 1980
• Expiry date: Nov 24, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D307/68
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for the production of substituted furans of the general formula ##STR1## wherein R is a member of the group consisting of alkoxy radicals having from 1-6 C-atoms, a substituted aryloxy radical, an unsubstituted aryloxy radical and an alkyl radical, R.sub.1 is a alkyl or aryl radical with 1-6 C-atoms, preferably methyl, R.sub.2 and/or R.sub.3 is an alkyl radical with 1-6 C-atoms or hydrogen by reacting a .beta.-dicarbonyl compound with an .alpha.-chlorocarbonyl compound in the presence of a compound capable of combining with the hydrochloric acid formed, at temperatures between 30.degree. and 100.degree. C., the reaction being carried out at pH values between 2 and 7, preferably between 3.5 and 6, with the addition of equimolar amounts of an alkaline earth carbonate.