The synthesis and antitumor activity of novel 1-alkyl-3-phenyland 3-alkyl-1-phenylimidazothiazolotriazines.

Two groups of isomeric imidazothiazolo[1,2,4]triazines and their oxindolylidene derivatives were obtained from 1-alkyl-3-aryl-4,5-dihydroxyimidazolidin-2-(thi)ones. One of the synthesized imidazo[4,5-e]thiazolo[2,3-c][1,2,4]triazine derivatives showed high cytostatic activity at a concentration of 10 μmol/l against four lines of tumor cells: HL-60(TB) (leukemia, –16.1% growth rate), SF-539 (CNS cancer, –2.6% growth rate), MDA-MB-435 (melanoma, –21.2% growth rate), and RXF 393 (kidney cancer, –6.1 % growth rate). [ABSTRACT FROM AUTHOR]