ChemInform Abstract: Facile Method for Conversion of 2-(Chloroseleno)benzoyl Chloride into 2-Substituted 3-Hydroxybenzo[b]selenophenes.

The easily accessible 2-(chloroseleno)benzoyl chloride has broad application in the synthesis of benzizoselenazol-3(2H)-ones and benzo[b]selenophen-3(2H)-ones. Treatment of 2-acylbenzo[b]selenophen-3(2H)-ones with nitrogen nucleophiles such as hydrazines and hydroxylamine resulted in formation of 2-substituted 3-hydroxybenzo[b]selenophenes in 72-98% yield.