The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 29, 1980
Filed:
Nov. 24, 1978
Rudolf Kaufmann, Burghausen, DE;
Hermann Braunling, Munich, DE;
Norman Haberle, Munich, DE;
Reinhard Muller, Munich, DE;
Consortium fur Elektrochemische Industrie GmbH, Munich, DE;
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.