Effect of Substituents on the Antifungal Activity of 4-ThiazoIidinones derived from 4-Methoxybenzalanilines

4-Thiazolidinones with unsubstituted N-phenyl ring and having hydroxy or thio group in ortho position of the N-phenyl ring have been synthesized by condensing thioglycolic acid and 2-mercaptopropionic acid with 4-methoxybenzalaniline, 4-methoxybenzal-2-thioaniline and 4-methoxybenzal-2-hydroxyaniline. These have been characterized on the basis of elemental analysis and spectral studies. Those having hydroxy group in the N-phenyl nucleus have been found to be effective fungicides, particularly against Alternaria alternata and Helminthosporium maydis by the spore germination inhibition technique.