I2‐Promoted [3+2] Cyclization of 1,3‐Diketones with Potassium Thiocyanate: a Route to Thiazol‐2(3H)‐One Derivatives.

An I2‐promoted strategy has been developed for the synthesis of thiazol‐2(3H)‐one derivatives from 1,3‐diketones with potassium thiocyanate. This [3+2] cyclization reaction involves C−S and C−N bond formation and exhibits good functional group tolerance. A series of thiazol‐2(3H)‐one derivatives are obtained in moderate to good yields. [ABSTRACT FROM AUTHOR]