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。
Convenient KI-catalyzed regioselective synthesis of 2-sulfonylindoles using water as solvent
作者:Hongjie Li、Xiaolong Wang、Jie Yan
DOI:10.1039/c7nj00474e
日期:——
A convenient procedure is developed for the preparation of 2-sulfonylindoles fromindoles and sodium sulfinates catalyzed by KI in water. This environmentally benign 2-sulfonylation of indoles proceeds efficiently under mild conditions, affording the products with high regioselectivity and in moderate to good yields.
Multifunctionalization of Indoles: Synthesis of 3‐Iodo‐2‐sulfonyl Indoles
作者:Hyowon Park、Junryeol Bae、Soobin Son、Hye‐Young Jang
DOI:10.1002/bkcs.11882
日期:2019.11
of indoles by using thiosulfonates, trimethyl sulfoxonium iodide (Me3SOI), and H2O2 was studied. The reaction of thiosulfonates with Me3SOI and H2O2 produced sulfonyl radicals and an iodination reagent, both of which were incorporated in indoles to form 3‐iodo‐2‐sulfonylindolesunder carefully controlled conditions. The related reaction mechanism and the substrate scope of 3‐iodo‐2‐sulfonyl indoles
研究了使用硫代磺酸盐,三甲基碘化碘甲烷(Me 3 SOI)和H 2 O 2对吲哚进行选择性多官能化的方法。硫代磺酸盐与Me 3 SOI和H 2 O 2的反应产生了磺酰基和碘化试剂,二者均在严格控制的条件下掺入吲哚中以形成3-碘-2-磺酰基吲哚。介绍了相关的反应机理和3-碘-2-磺酰基吲哚的底物范围。
Regioselective <i>C</i>2 Sulfonylation of Indoles Mediated by Molecular Iodine
A facile and general method for regioselective C2 sulfonylation reaction of indoles mediated by iodine is described. The 2-sulfonylated products were obtained up to 96% yield under mild reaction conditions (room temperature, 2 h).