PROCESS FOR PRODUCING 4H-BENZO/4,5/CYLOPENTA/1,2-B/ THIOFENE DERIVATIVES AND PHARMACEUTICAL COMPOSITIONS CONTAINING THEM

摘要

alpha -[5H-dibenzo[a,d]cyclohepten-5-ylidene]-carboxylic acids e.g. of formula I …… wherein R1 is H, C1-4alkyl or phenyl-(C1-4alkyl), R2 is H or C1-4alkyl and ring A is unsubstituted or halo- or hydroxy-substituted, as well as the physiologically-hydrolysable and -accceptable esters thereof have valuable pharmaceutical, in particular anti-inflammatory, antipyretic and analgesic properties.