PROCESS FOR PRODUCING CYCLOHEXANETRIONE CARBOXYLIC ACID THIOL ESTERS

    公开(公告)号:HUT54980A

    公开(公告)日:1991-04-29

    申请号:HU644290

    申请日:1990-10-12

    Applicant: BASF AG

    Abstract: Preparation of cyclohexanetrionecarboxylic acid thiol esters of the formula I in which R and R represent optionally substituted alkyl, alkenyl, alkynyl, cycloalkyl, benzyl or phenyl, and R additionally denotes hydrogen, by reacting a cyclohexanetrione compound II with hydroxylamine or hydroxylamine O-sulphonic acid in an inert solvent at temperatures from 0 to 150 DEG C to give cyclohexanetrione compounds III subsequently reacting the compounds III with a mercaptan IV R -SH IV in the presence of an anhydrous acid HX to give cyclohexanetrione imidothioester salts V where X represents the acid radical, and hydrolysing the compounds V to give the cyclohexanetrione carboxylic acid thiol esters I.

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