Cu-Catalyzed Deoxygenative C2-Sulfonylation Reaction of Quinoline <i>N</i>-Oxides with Sodium Sulfinate
作者:Bingnan Du、Ping Qian、Yang Wang、Haibo Mei、Jianlin Han、Yi Pan
DOI:10.1021/acs.orglett.6b02289
日期:2016.8.19
An unexpected Cu-catalyzed deoxygenative C2-sulfonylation reaction of quinoline N-oxides in the presence of radical initiator K2S2O8 was developed that used sodium sulfinate as a sulfonyl coupling partner. The mechanism studies indicate that the reaction proceeds via Minisci-like radical coupling step to give sulfonylated quinoline with good chemical yields.
在自由基引发剂K 2 S 2 O 8的存在下,开发了出乎意料的Cu催化的喹啉N-氧化物的C2-磺酰化脱氧反应,该反应使用亚磺酸钠作为磺酰基偶联剂。机理研究表明,该反应通过类似Minisci的自由基偶联步骤进行,从而得到具有良好化学收率的磺酰化喹啉。
Iodine/TBHP-Promoted One-Pot Deoxygenation and Direct 2-Sulfonylation of Quinoline<i>N</i>-Oxides with Sodium Sulfinates: Facile and Regioselective Synthesis of 2-Sulfonylquinolines
A highly efficient iodine/TBHP-mediated one-pot deoxygenative and regioselective C2-sulfonylation of quinoline N-oxides with sodium sulfinate salts has been developed. This metal, base and phosphorus-free protocol employs readily accessible and easy to handle reagents, and can be conveniently carried out at room temperature under mild conditions, providing an alternative access to a series of C2 sulfonyl
Hantzsch Ester as a Visible‐Light Photoredox Catalyst for Transition‐Metal‐Free Coupling of Arylhalides and Arylsulfinates
作者:Da‐Liang Zhu、Qi Wu、Hai‐Yan Li、Hong‐Xi Li、Jian‐Ping Lang
DOI:10.1002/chem.201905281
日期:2020.3.18
(HEH) has been utilized as a visible-light photoredox catalyst for the cross coupling of arylhalides and arylsulfinates without transition metal, sacrificial agent, and mediator. This method is compatible with various functional groups and provides diarylsulfones in good to high yields. Mechanistic studies indicate that this reaction undergoes the stepwise light irradiation of HE- , single electron
Exogenous-oxidant- and catalyst-free electrochemical deoxygenative C2 sulfonylation of quinoline <i>N</i>-oxides
作者:Minbao Jiang、Yong Yuan、Tao Wang、Yunkui Xiong、Jun Li、Huijiao Guo、Aiwen Lei
DOI:10.1039/c9cc07777d
日期:——
An exogenous-oxidant- and catalyst-free electrochemical deoxygenative C2 sulfonylation reaction has been achieved. By employing quinoline N-oxides as the starting materials, the electrochemical C–H sulfonylation of electron-deficient quinolines was indirectly achieved at room temperature and a variety of sulfonylated quinoline derivatives were synthesized in modest to high yield with excellent regioselectivity
A photocatalytic aminomethylation of heterocycles with organic dye is reported. The C−C bond formation through a aminomethyl radical formation enables access to a series of functionalized heterocycles in one step with no need of transition metals.