Process for preparing di-esters of higher alpha, omega-dicarboxylic acids

Preparation of higher alpha , omega -dicarboxylic acid esters (I) comprises: (a) continuously feeding an 8-20 ring membered cycloaliphatic ketone (II), at least an equimolar amount of a carbonic acid diester (III) and a catalytic amount of a strong base to a reaction zone, in which condensation of (...

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Bibliographic Details
Main Authors METZ, JOSEF, KOEHLER, GUENTHER
Format Patent
LanguageEnglish
French
German
Published 25.07.2001
Edition7
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
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Summary:Preparation of higher alpha , omega -dicarboxylic acid esters (I) comprises: (a) continuously feeding an 8-20 ring membered cycloaliphatic ketone (II), at least an equimolar amount of a carbonic acid diester (III) and a catalytic amount of a strong base to a reaction zone, in which condensation of (II) and (III) to the corresponding cyclic beta -ketoacid ester enolate and ring cleavage to (I) by the released alcohol take place, and (b) continuously withdrawing the reaction mixture.
Bibliography:Application Number: EP19970106416