10.1016/j.tet.2017.02.063
The study titled "Copper-catalyzed N–H/S–H functionalization: A strategy for the synthesis of benzothiadiazine derivatives" by ?engül Dilem Do?an presents a novel copper-catalyzed method for synthesizing 1,2,4-benzothiadiazin-3(4H)-ones. The research highlights the direct construction of N–S bonds using readily available N-(2-mercaptophenyl)-N'-(phenyl)-ureas as starting materials. The copper catalyst, specifically copper(I) iodide, plays a crucial role in facilitating the N-H/S-H activation, leading to the formation of the desired benzothiadiazine derivatives under mild conditions. The reaction is performed in N,N-dimethylformamide (DMF) under molecular oxygen, showcasing high efficiency and step economy. The study demonstrates the versatility of the method by synthesizing a variety of benzothiadiazine derivatives with different substituents, including aromatic and aliphatic groups, without significant effects on the reaction outcome. The findings offer an efficient and environmentally benign approach to synthesizing biologically important benzothiadiazine compounds, which have applications in pharmaceuticals and as antiviral agents.