Novel N-Substituted Thiazolidinones as Proton Pump Inhibitors and Potent Anti-Ulcer Agents: SAR Study

A series of N-substituted thiazolidinone derivatives 5(a-j) was synthesized in good yield. All the compounds were screened for their in vitro H+, K+- ATPase inhibitory activity. The structures of the synthesized compounds were confirmed by the spectral data. Compounds 5d, 5e, 5f and 5c showed potential H+, K+- ATPase blocking activities, when compared to standard drug Lansoprazole. Structure-activity relationship studies, with various chemical groups, revealed that position and nature of the substitution on the N-thiazolidinones are crucial for H+, K+- ATPase inhibitory activity.