Synthesis of 1-(6-chloro-1,1-dioxo-1,4,2-benzodithiazin-3-yl)semi-carbazides and their transformation into 4-chloro-2-mercapto-N-(4,5-dihydro-5-oxo-4-phenyl-1H-1,2,4-triazol-3-yl)benzenesulfonamides as potential anticancer and anti-HIV agents.

Synthesis of a series of 1-(6-chloro-1,1-dioxo-1,4,2-benzodithiazin-3-yl)semicarbazides (6-16) and 4-chloro-2-mercapto-N-(4,5-dihydro-5-oxo-4-phenyl-1H-1,2,4-triazol-3-yl)benzenesulfonamides (17-22) were reported. Compounds 7-9, 17, 19-22 were tested at the US National Cancer Institute for their in vitro anticancer and anti-HIV activities. Results of anticancer screening showed moderate activity of 21 and 22, while 19 was found to have encouraging anti-HIV activity at EC(50) = 28.8 microM.