5-(2-Oxo-3-indolinylidene)thiazolidine-2,4-dione-1,3-di-Mannich base derivatives: synthesis and evaluation for antileukemic activity.

A novel series of 5-(2-oxo-3-indolinylidene)thiazolidine-2,4-dione, having the 1- and 3-positions of the isatin and thiazolidine rings respectively, substituted by various Mannich bases, was prepared. Five compounds were evaluated for antileukemic activity against P388 lymphocytic leukemia in the mouse. The di-Mannich base with a dimethylamino component exhibited the highest activity of the tested compounds. Introduction of bromine into the aromatic moiety of isatin ring (position 5) increased the activity of the parent molecule to a smaller extent.