Transvinylation of carboxylic acids
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United States of America Patent
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Jun 29, 1993
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N/A
app pub date -
Jan 6, 1992
filing date -
Jan 4, 1991
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Abstract
Transvinylation process between vinyl acetate or vinyl propionate and a carboxylic acid of general formula (I), RCOOH (I) in which R represents a substituted or non-substituted alkyl, cycloalkyl, aralkyl or aromatic radical, in the presence of a palladium catalyst, in which the catalyst is obtained in situ, by reacting, in the reaction medium, a derivative of palladium chosen from the group constituted by palladium II acetate, nitrate or hydroxide and palladium deposited on charcoal, with a tertiary amine chosen from the group constituted by 2,2'-bipyridyl, orthophenanthroline or tetramethylethylenediamine, that the quantity of palladium used, expressed in gram-atom of palladium II per 100 moles of carboxylic acid of general formula (I) is between 0.005 and 1 and that the quantity of amine is greater than 1 and less than 10 moles per gram-atom of palladium II used and use for the preparation of certain products.
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