Mechanochemically Induced Thianthrenium Salts-Based Arylation of Diverse Heterocyclic Scaffolds

Herein, a mechanochemically triggered C–H arylation of coumarins, quinoline-N-oxides, and uracil molecules with aryl thianthrenium salts is described. Aryl thianthrenium salts are primarily acknowledged for their expedient reusability and adherence to atom economy principles. Mechanistic studies suggested that mechanical stress promoted the homolytic scission of C–S bond of aryl thianthrenium salts, forming aryl radical intermediate. Later, the aryl radical intermediate is engaged in addition reaction with the above heterocycles, leading to the desired products in good yields. This versatile protocol accommodates a wide range of functional groups and facilitates the synthesis of bioactive compounds and drug molecules.