Convenient Synthesis of Salicylanilide Sulfonates from 1,2,3-Benzotriazin-4(3)-ones and Organosulfonic Acids Denitrogenative Cross-Coupling.

An efficient and straightforward approach to synthesize salicylanilide aryl and alkyl sulfonates from 1,2,3-benzotriazin-4(3)-ones and organosulfonic acids is described. This protocol is operationally simple and scalable, exhibits a broad substrate scope with high functional group tolerance, and affords the desired products in good to high yield. Application of the reaction is also demonstrated by converting the desired product to synthetically useful salicylamides in high yields.