Synthesis and biological activity of thiobasidalin

Article abstract of DOI:10.1016/S0223-5234(98)80064-0

Thiobasidalin 2, the thiolactone analogue of the antibiotic basidalin 1, is synthesized starting from easily accessible thiotetronic acid 3 via a straightforward reaction sequence employing the chemoselective lithium aluminum hydride reduction of the acid pyrazolide 31 as the final key step. Antimicrobial tests reveal that thiobasidalin 2 as well as a number of its synthetic congeners display considerable activity against both eucaryontes and procaryontes.