A mild approach for direct C2 sulfonylation of heteroaromatic N-oxides with sulfonyl hydrazides affording 2-sulfonyl quinolines/pyridines has been developed. A variety of heteroaromatic N-oxides and sulfonyl hydrazides participate effectively in this transformation which uses hypoiodites (generated in situ from NaI and TBHP) as a means of substrate activators. In this reaction, the N-oxide plays a
Iron-Catalysed Regioselective Arylsulfonylation of Quinoline <i>N</i>-Oxides with Sodium Arylsulfinates under Microwave Irradiation
作者:Wenpeng Mai、Mingxiu Lv、Xiaofeng Zhang、Kui Lu
DOI:10.3184/174751917x15125690124246
日期:2017.12
An efficient protocol for one-pot deoxygenative and regioselective synthesis of 2-arylsulfonylquinolines has been developed via iron-catalysed cross-couplingreaction of quinoline N-oxides with sodium arylsulfinates in moderate to good yields undermicrowaveirradiation. The reactions proceeded over a broad range of substrates with good regioselectivity and functional group tolerance.
Iron-catalyzed deoxygenation and 2-sulfonylation of quinoline <i>N</i>-oxides by sodium sulfinates towards 2-sulfonyl quinolines
作者:Ping Li、Yangji Jiang、Han Li、Wanrong Dong、Zhihong Peng、Delie An
DOI:10.1080/00397911.2018.1460670
日期:2018.8.3
Abstract An iron(III)-catalyzed protocol towards 2-sulfonyl quinolinesfromquinolineN-oxides and sodium sulfinates was herein illustrated. The general and direct option featured for high efficiency (up to 91% yields) and good functional compatibilities (27 examples) in the Fe(III)-catalysis. Moreover, free radical mechanism was proposed for the one-pot deoxygenation and sulfonylation reaction based
SO2F2-mediated deoxygenative C2-sulfonylation of quinoline N-oxides with sodium sulfinates
作者:Chengmei Ai、Xudong Liao、Yi Zhou、Zhaohua Yan、Sen Lin
DOI:10.1016/j.tetlet.2020.152586
日期:2020.12
A mild and efficient method for deoxygenative C2-sulfonylation of quinoline N-Oxides in the presence of a base has been developed employing extremely inexpensive SO2F2 as an activator and sodium sulfinate as nucleophilic sulfonylation source. It is noteworthy that the reaction proceeded well under metal- and oxidant-free conditions to give a variety of 2-sulfonylquinolines in medium to good yields
已经开发了一种温和有效的方法,该方法在碱存在下,使用极其便宜的SO 2 F 2作为活化剂,并使用亚磺酸钠作为亲核磺酰化源,对喹啉N-氧化物的C2-磺酰化进行脱氧。值得注意的是,该反应在无金属和无氧化剂的条件下进行得很好,以中等至良好的产率得到了各种2-磺酰基喹啉。
Transition-metal- and oxidant-free three-component reaction of quinoline <i>N</i>-oxides, sodium metabisulfite and aryldiazonium tetrafluoroborates <i>via</i> a dual radical coupling process
Synthesis of 2-sulfonylquinolines via a three-component reaction of quinoline N-oxides, sodium metabisulfite, and aryldiazonium tetrafluoroborates under transition-metal- and oxidant-free conditions.