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:
Jun. 14, 1983
Filed:
Jan. 12, 1981
Applicant:
Inventors:
Walter Dursch, Konigstein, DE;
Hans-Jerg Kleiner, Kronberg, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ; C07F / ;
U.S. Cl.
CPC ...
260968 ; 2605 / ; 2605 / ; 260933 ;
Abstract
Process for the manufacture of vinyl phosphonic acid derivatives of the formula ##STR1## with R.sub.1 being hydrogen or alkyl with 1 to 4, preferably 1 to 2, carbon atoms and n being 1 or 2, which comprises heating to 150.degree.-270.degree. C., preferably 170.degree. to 230.degree. C., 2-acetoxyethane phosphonic acid dialkyl esters of the formula ##STR2## with R.sub.2 being alkyl with 1 to 4, preferably 1 to 2, carbon atoms, in the presence of acidic or basic catalysts.