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Nuclear transcription factor nuclear factor-kappa B (NF-κB) has diverse pathophysiological functions, and NF-κB inhibitors are considered to be candidates for multiple therapeutic applications. We previously reported a novel triazine-based NF-κB inhibitor, 2-anilino-4,6-dichloro-1,3,5-triazine (NI241), that directly inhibits DNA binding of NF-κB. Here, we report synthesis of a series of triazine derivatives and evaluation of their structure-activity relationships for NF-κB inhibition. We found that 2-amino-4,6-dichloro-1,3,5-triazine substructure is essential for the inhibitory activity of the lead compound NI241, and modification of NI241 by introduction of an m-methoxy substituent on the phenyl ring afforded the more potent derivative 28. The structure-activity relationships identified in this study suggested a possible mechanism of irreversible NF-κB inhibition by NI241, and should be helpful in the design of other NF-κB inhibitors.

Synthesis and Structure–Activity Relationship Study of Triazine-Based Inhibitors of the DNA Binding of NF-κB