The fast and efficient KI/H<sub>2</sub>O<sub>2</sub> mediated 2-sulfonylation of indoles and <i>N</i>-methylpyrrole in water
作者:Jun Zhang、Zhong Wang、Lingjuan Chen、Yan Liu、Ping Liu、Bin Dai
DOI:10.1039/c8ra09367a
日期:——
The rapid and efficient KI/H2O2-mediated 2-sulfonylation of substituted indoles and N-methylpyrrole was established. The corresponding 2-sulfonylation products are synthesizedfrom readily available sulfur sources, namely arylsulfonyl hydrazides, 4-methylbenzenesulfinic acid and sodium 4-methylbenzenesulfinate in good to excellent yields in only 5 min. Moreover, the aqueous solution of hydrogen peroxide
建立了快速高效的KI/H 2 O 2介导的取代吲哚和N-甲基吡咯的2-磺酰化反应。相应的 2-磺酰化产物是由容易获得的硫源,即芳基磺酰肼、4-甲基苯亚磺酸和 4-甲基苯亚磺酸钠在 5 分钟内以良好至优异的产率合成的。此外,过氧化氢水溶液既用作氧化剂又用作溶剂。机理研究表明,2,3-二碘二氢吲哚是主要的磺酰化中间体。
A Sulfonylation Reaction: Direct Synthesis of 2-Sulfonylindoles from Sulfonyl Hydrazides and Indoles
作者:Pranjit Barman、Rajjakfur Rahaman
DOI:10.1055/s-0036-1588398
日期:——
novel TBHP/I2-mediated coupling of C3/unsubstituted indoles with sulfonyl hydrazides. The reaction utilizes readily available starting materials under mild reaction conditions, providing an alternative and attractive approach to 2-sulfonylindoles with high yields. The developed synthetic procedure is suitable for both N-protected or unprotected indoles.
通过 TBHP/I2 介导的 C3/未取代吲哚与磺酰肼的新型偶联,开发了 2-磺酰吲哚衍生物的无金属合成。该反应在温和的反应条件下使用容易获得的原料,为高产率的 2-磺酰吲哚提供了一种替代且有吸引力的方法。开发的合成程序适用于 N 保护或未保护的吲哚。
Electrooxidative Metal-Free Dehydrogenative α-Sulfonylation of 1<i>H</i>-Indole with Sodium Sulfinates
underwent this sulfonylation smoothly at room temperature under metal-free and chemical-oxidant-free conditions to afford indolyl arylsulfones in good to high yields. This reaction was found to tolerate a variety of functional groups, including halides and cyclopropyl, ether, ester, and aldehyde groups. It was applied to the synthesis of biologically active 5-HT6 modulators.
Iodine-Catalyzed Regioselective 2-Sulfonylation of Indoles with Sodium Sulfinates
作者:Fuhong Xiao、Hui Chen、Hao Xie、Shuqing Chen、Luo Yang、Guo-Jun Deng
DOI:10.1021/ol402987u
日期:2014.1.3
Iodine-catalyzed selective 2-arylsulfonyl indole formation from indoles and sodiumsulfinates is disclosed. Various substituted 2-arylsulfonyl indoles were obtained in one pot in the absence of metal catalyst at room temperature under air.