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An amino group is inserted in the N'-phenyl side and the newly designed N-benzamido-N'-benzoylthioureas are bound to anions despite the strong intramolecular hydrogen bond (IHB). The results have shown that the potential anion receptors or organocatalysts are developed on the basis of this framework with a wide structural diversity.

The article explains the process of anion-triggered substituent-dependent conformational switching of salicylanilides. It also discusses the inhibitory mechanism of salicylanilides.

A family of simple N-aminothiourea based anion receptors, N- (substituted-benzamido)-N'-phenylthioureas with substituents ranging from electron withdrawing to moderately electron donating is reported. Study disclosed that these receptors showed unprecedented red shifts in their absorption spectra by as much as 14 325 cm (supra -1) upon anion binding and substantially enhanced anion affinities.