Process for the preparation of beta-disubstituted monocarboxylic acids
AssigneeElf France
InventorsPatrice P. M. Deschamps, Roger Gallo, Henri Grangette
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Abstract
A process for the preparation of beta-disubstituted monocarboxylic acids derived from tertiary acyclic, monocyclic or bicyclic hydrocarbons. The process consists in reacting said hydrocarbons with vinylidene chloride and either a functional compound where the molecule includes a tertiary carbon atom bonded to the heteroatom of a functional group such as a tertiary alcohol, an ether, or a tertiary halide or an alkene, in the presence of a concentrated protonic acid. The reaction can be carried out in the presence of a catalyst of the Lewis acid type and particularly BF.sub.3. These acids are useful as synthesis intermediates and as additives for oils and lubricants.
Claims13
A process for the preparation of a beta-disubstituted monocarboxylic acid of the formula ##STR8## wherein R.sub.1, R.sub.2, and R.sub.3 are identical or different and each represents a saturated or unsaturated monovalent hydrocarbon radical containing from 1 to 22 carbon atoms or R.sub.1 and R.sub.2 are interbonded to form with the carbon atoms to which they are attached a monocyclic or bicyclic structure comprising from 5 to 22 carbon atoms which comprises reacting a hydrocarbon of the formula ##STR9## wherein R.sub.1, R.sub.2 and R.sub.3 have the above meaning, with vinylidene chloride, and a functional compound wherein the molecule contains a tertiary carbon atom bonded to the heteroatom of a functional group or an alkene in the presence of a concentrated protonic acid.
Dependencies are inferred from the claim text.