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:
Apr. 26, 1977
Filed:
Mar. 20, 1975
Bernd Lippsmeier, Huth-Knapsack, DT;
Klaus Hestermann, Erftstadt Bliesheim, DT;
Martin Reuter, Frankfurt am Main-Unterliederbach, DT;
Hoechst Aktiengesellschaft, Frankfurt am Main, DT;
Abstract
Production of tertiary methylphosphine oxides of the general formula ##STR1## in which R and R' each stand for identical or different, branched or unbranched, substituted or unsubstituted alkyl, cycloalkyl, aralkyl or aryl groups having from 1 to 18 carbon atoms. The compounds are produced by subjecting tertiary hydroxymethylphosphines of the general formula ##STR2## in which R and R' have the meanings given above, to a thermal rearrangement reaction at temperatures higher than about 90.degree. C or, in the presence of a catalyst, at temperatures within the range -10 and +250.degree. C.