Redox-active benzimidazolium sulfonamides as cationic thiolating reagents for reductive cross-coupling of organic halides
作者:Weigang Zhang、Mengjun Huang、Zhenlei Zou、Zhengguang Wu、Shengyang Ni、Lingyu Kong、Youxuan Zheng、Yi Wang、Yi Pan
DOI:10.1039/d0sc06446g
日期:——
Redox-active benzimidazolium sulfonamides as thiolating reagents have been developed for reductive C–S bond coupling. The IMDN-SO2R reagent provides a bench-stable cationic precursor to generate a portfolio of highly active N–S intermediates, which can be successfully applied in cross-electrophilic coupling with various organic halides. The employment of an electrophilic sulfur source solved the problem
已开发出具有氧化还原活性的苯并咪唑磺酰胺作为硫醇化试剂用于还原 C-S 键偶联。IMDN-SO 2 R 试剂提供了一种稳定的阳离子前体,可生成一系列高活性 N-S 中间体,可成功应用于与各种有机卤化物的交叉亲电偶联。采用亲电硫源解决了催化剂失活问题,避免了硫醇的异味,具有条件实用、底物范围广、耐受性好等特点。
CsOH·H<sub>2</sub>O-Promoted Synthesis of Aryl Sulfides via Direct Coupling of Aryl Halides and Thiols
作者:Ravi Varala、E. Ramu、M. Mujahid Alam、Srinivas R. Adapa
DOI:10.1246/cl.2004.1614
日期:2004.12
We report here our observation that, using appropriate reaction conditions, CsOH·H2O-promoted coupling of aryl halides with thiols can be performed in moderate to good yields without a transition metal catalyst.