A method of producing benzalicyclic carboxylic acid derivatives of the general formula: **(See formula)** wherein R1 is an aryl group which may be substituted and n is 1 or 2, or a derivative in the carboxyl function thereof, comprising subjecting a compound of the general formula: **(See formula)** in which R1 and n have the same meanings given above, to solvolisis. (Machine-translation by Google Translate, not legally binding)
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