Iodine-Catalyzed Cyclization of o-Nitrothiophenols with Cyclohexanones to Phenothiazines
作者:Yinglin Zhao、Jin Zhang、Jingwu Zhang、Zhida Zhang、Renhua Liu
DOI:10.1021/acs.joc.4c00039
日期:2024.6.7
Here, a novel iodine-catalyzed direct cyclization of o-nitrothiophenols with cyclohexanones to phenothiazines has been described without external oxidants and hydrogen acceptors. The nitro of o-nitrothiophenol works as both a hydrogen acceptor and a coupling group, and water is the only byproduct. The reaction involves the reduction of nitro groups, C–H bond thioetherification, and C–H bond dehydroaromatization