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A series of new 1-[4-(aminosulfonyl)phenyl]-5-oxopyrrolidine-3-carboxylic acids were synthesized by the solvent-free condensation of 4-aminobenzenesulfonamides with itaconic acid at 140–165 °C. The synthesized compounds were examined for antimicrobial activity. [ABSTRACT FROM AUTHOR]

A series of new heterocyclic ensembles, derivatives of 5-oxo-1-(1,3,4-thiadiazol-2-yl)-pyrrolidine-3-carboxylic acid, was synthesized by heating 5-substituted 1,3,4-thiadiazol-2-amines and itaconic acid under solvent-free conditions or with the addition of acetic acid at 140–150 °C. The resulting acids can be used as building blocks in the synthesis of new potentially biologically active heterocyclic compounds. [ABSTRACT FROM AUTHOR]