3,3'-Di[1,3-thiazolidine-4-one]system. IV. Synthesis and pharmacological properties of 3,3'(1,2-ethanediyl)bis [2-aryl-1,3-thiazolidine-4-one 1,1-dioxide] derivatives.

The 1,1' disulfones obtained by oxidation of the corresponding dl and meso 3,3'(1,2-ethanediyl)bis [2-aryl-4-thiazolidinone] compounds previously investigated, were evaluated as anti-histamine, anti-inflammatory, analgesic and anti-pyretic agents. All 2,2' fluorophenyl compounds were found to be significantly active in inhibiting carrageenin-induced edema, whereas only para-substituted derivatives were active on the histamine-induced bronchospasm in the guinea-pig. They also showed analgesic effects that reached and sometimes exceeded those of indomethacin and phenylbutazone used as reference drugs.