Convenient chlorination with concentrated hydrochloric acid in the presence of iodosylbenzene

摘要

An efficient chlorination of -keto esters, 1,3-diketones, and alkenes was performed conveniently with concentrated HCl in the presence of PhIO, selectively giving -chloro - keto esters, 2-chloro-1,3-diketones, and 1,2-dichloroalkanes, respectively. It was suggested that the chlorination took place with (dichloroiodo)benzene generated in situ. A selective anti-addition was observed in the chlorination of indene.