A NOVEL SYNTHESIS OF 2<i>H</i>-1,4-BENZOSELENAZINES FROM (<i>o</i>-NITROPHENYL)DISELENIDES AND<i>ω</i>-BROMOKETONES PROMOTED BY Sm/TiCl<sub>4</sub>SYSTEM
作者:Weihui Zhong、Yongmin Zhang、Xiaoyuan Chen
DOI:10.1080/00304940109356585
日期:2001.4
Sm/TiCI, system could induce simultaneous reduction of nitro group and S-S bond in bis(o-nitropheny1)disulfides to give heterocycles containing nitrogen and sulfur." Compared with S-S bond, Se-Sebond is easier to reduce by the Sm/TiCI, system.i In order to extend the application of Sm/TiCl,, we investigated if the Sm/TiCI, system could induce simultaneous reduction of nitro group and Se-Sebond in bi
Conversion of bis(o-nitrophenyl)diselenides to heterocycles containing selenium and nitrogen with the aid of samarium diiodide
作者:Xiaoyuan Chen、Weihui Zhong、Yongmin Zhang
DOI:10.1002/hc.10034
日期:——
Treatment of bis(o-nitrophenyl)diselenides with SmI2 led to simultaneous reduction of nitro groups and reductive cleavage of SeSe bonds as well as to the formation of the intermediates 2. The intermediates 2 were “living” double-anions formed in situ, and reacted readily with ω-bromoketones and α-bromocarboxylic acid derivatives to afford the desired 2H-1,4-benzoselenazines and 2H-1,4-benzoselenazin-3(4H)-ones