| 摘要 |
This invention relates to the preparation of esters or salts of aromatic or etheroaromatic acids having formula Y-Ar-CO-OR (I), where: Ar represents an aromatic group constituted by one or more benzene rings, optionally condensed, or an etheroaromatic nucleus optionally condensed with one or more benzene rings; Y represents from zero to more substituents, equal or different, chosen among a halogen; an alkyl group having up to 6 carbon atoms; an alkoxy group having up to 5 carbon atoms; an ester group -COOR', where R' contains up to 5 carbon atoms; a hydroxyl group; a phenyloxy group, optionally substituted with groups inert under reaction conditions; a trifluoromethyl group; a nitrile group; an amidic group (-CONH2); an acetamidic group (-NH-CO-CH3); or an acyl group -CO-R'', where R'' represents a hydrocarbon group having up to 8 carbon atoms; R represents an alkyl group R1 having up to 5 carbon atoms or an alkali metal or alkaline earth metal M. These esters and salts (I) are obtained by reaction of a halide Y-Ar-X (II), where Ar and Y have the hereinabove defined meanings, while X is Cl, Br or I, with carbon monoxide, in an alcoholic solvent R1OH (where R1 is an alkyl group having up to 5 carbon atoms) at atmospheric pressure and at temperatures ranging between -10 DEG and 60 DEG C. in the presence of an acidity-acceptor compound and of a catalyst constituted by a cobalt complex having formula (III): Z-Co(CO)4 (III) where Z is a group chosen among CH3; CH2F; CHF2; CF3; CH2-CN; CH2-COOR''', where R''' is an alkyl group having up to 8 carbon atoms or a benzene group, the latter optionally substituted with groups inert under reaction conditions; CH2Ar', where Ar' is an aromatic group constituted by from one to three benzene rings optionally condensed and optionally substituted with groups inert under the reaction conditions, in particular with electron-attractor groups.
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