Assembly of Substituted Phenothiazines by a Sequentially Controlled CuI/ L-Proline-Catalyzed Cascade CS and CN Bond Formation
作者:Dawei Ma、Qian Geng、Hui Zhang、Yongwen Jiang
DOI:10.1002/anie.200905646
日期:——
In the pro‐line of fire: A general and efficient cascade reaction approach to substituted phenothiazines, which relies on controlled sequential CuI/L‐proline‐catalyzed CS and CNbondformations, is described. DMSO=dimethylsulfoxide.
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