Solid‐State Direct Electrophilic Selenocyanation of (Hetero)Arenes using Mechanochemistry

Abstract A mechanochemical direct selenocyanation of arenes/heterocyclic arenes with electrophilic selenocyanating reagents to access (hetero)aryl selenocyanates has been developed. This protocol provided an efficient strategy to access various aromatic selenocyanates in yields up to 99 % under ball‐milling reaction conditions within 60 minutes. Gram‐scale reaction and further transformations of the product were conducted to demonstrate the synthetic utilities of this method.