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:
Mar. 27, 2012
Filed:
Jun. 11, 2008
Thomas-norbert Müller, Monheim, DE;
Michael Dockner, Köln, DE;
Thomas-Norbert Müller, Monheim, DE;
Michael Dockner, Köln, DE;
SALTIGO GmbH, Langenfeld, DE (US);
Abstract
What is described is a process for preparing 2-hydroxyacetals of the general formula in which Ris hydrogen, a branched or unbranched C-C-alkyl radical, an electron-deficient, halogen-, NO—, CN—, CF—, acyl group- or branched or unbranched alkyl group-substituted or unsubstituted C-C-aryl or heteroaryl, and Ris a branched or unbranched C-C-alkyl radical, or both Rradicals are bonded directly to one another or to one another via a C-Cunit, by reacting an enol compound of the general formula (II) in which Ris the same and Ris as defined for formula (Ia), with bromine to give the corresponding dibromo adduct and then reacting this dibromo adduct with an alkoxide of the general formula (III) M-O—R(III) in which Ris as defined for formula (Ia) and O is oxygen and M is lithium, sodium or potassium. What is likewise described is the preparation of the corresponding 2-hydroxyalkanals from the 2-hydroxyacetals thus obtained by acidic hydrolysis.