Synthesis, Antimicrobial and Antitumor Properties of 5-Thiophen-2-ylmethylen-2-Thioxothiazolidin-4-one Derivatives

— By the reaction of thiophen-2-carbaldehyde with rhodanine derivatives, 5-thiophen-2-ylmethylene-2-thioxothiazolidin-4-ones have been synthesized. The resulting (4-oxo-5-thiophen-2-ylmethylen-2-thioxothiazolidin-3-yl)alkane carboxylic acids have been used to acylate the biogenic amine tryptamine and its derivatives. As a result, a number of novel N -[2-(5-[ R -1 H -indol-3-yl)-ethyl]-2-(4-oxo-5-thiophen-2-ylmethylen-2-thioxothiazolidin-3-yl)carbamides have been synthesized. The antimicrobial and antitumor properties of the resulting compounds have been tested. Compounds with a high antimicrobial activity against Staphylococcus aureus and Cryptococcus neoformans have been identified .