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

An I 2 ‐promoted strategy has been developed for the synthesis of thiazol‐2(3 H )‐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(3 H )‐one derivatives are obtained in moderate to good yields. magnified image