Properly substituted diazosulfides XC6H4-N=N-SPh () (either isolated or generated from arenediazonium tetrafluoroborates and sodium benzenethiolate) react with tetrabutylammonium cyanide, in Me2SO under photon or electron stimulation, leading to nitriles XC6H4CN (). Satisfactory yields of , comparable with those of the Sandmeyer reaction, are obtained when X = 3- or 4-CF3 , 2-, 3-, or 4-CN, 4-F, 4-MeO
适当取代的重氮硫化物XC 6 H 4 -N = N-SPh()(由四氟硼酸芳族重氮鎓和苯硫代硫酸钠分离或产生)在光子或电子刺激下在Me 2 SO中与氰化四丁基铵反应,生成腈XC 6 H 4 CN ()。的令人满意的产率,与那些Sandmeyer反应的可比性,获得当X = 3或4-CF 3,2-,3-,或4-CN,4-F,4-的MeO,3-梅科,4- NO 2,4-PhCO和4- PhSO 2。由于不同的原因,当X = H,4-MeO,2-或3-NO 2时,该反应实际上无法作为有用的腈合成反应。收集到的证据与S RN 1机制的干预非常吻合,重氮化合物由于易于还原并随后迅速断裂CN和NS键而成为重参与反应的底物。所涉及的机理的重要结果是溴代和氯代衍生物(:X = Br,Cl)的行为,它们通过同时引入两个氰基官能团,导致相应二氰基苯的收率令人满意。
Environmentally Friendly and Recyclable CuCl2-Mediated C–S Bond Coupling Strategy Using DMEDA as Ligand, Base, and Solvent
作者:Guodong Shen、Xianqiang Huang、Qichao Lu、Zeyou Wang、Weiwei Sun、Yalin Zhang、Manman Sun、Zhiming Wang
DOI:10.1055/a-1561-5508
日期:2022.1
Simple reaction conditions and recyclable reagents are crucial for environmentally friendly industrial applications. An environment-friendly, recyclable and economic strategy was developed to synthesize diaryl chalcogenides by the CuCl2-catalyzed C–S bond-formation reaction via iodobenzenes and benzenethiols/1,2-diphenyldisulfanes using N,N′-dimethylethane-1,2-diamine (DMEDA) as ligand, base, and solvent
Room‐Temperature Arylation of Thiols: Breakthrough with Aryl Chlorides
作者:Min Jiang、Haifang Li、Haijun Yang、Hua Fu
DOI:10.1002/anie.201610414
日期:2017.1.16
catalyst loadings, specially designed ligands, high temperatures, and/or strong bases, thus leading to high costs and the incompatibility of some functional groups. Herein, we describe a simple and efficient visible‐light photoredox arylation of thiols with aryl halides at roomtemperature. More importantly, various aryl chlorides are also effective arylation reagents under the present conditions.
Generation of Aryl Radicals from Aryl Halides: Rongalite-Promoted Transition-Metal-Free Arylation
作者:Fazhi Yu、Runyu Mao、Mingcheng Yu、Xianfeng Gu、Yonghui Wang
DOI:10.1021/acs.joc.9b01113
日期:2019.8.16
is reported. Rongalite as a novel precursor of super electron donors was used to initiate a series of electron-catalyzed reactions under mild conditions. These transition-metal-free radical chain reactions enable the efficient formation of C–C, C–S, and C–P bonds through homolytic aromatic substitution or SRN1 reactions. Moreover, the synthesis of antipsychoticdrug Quetiapine was performed on gram
Chan–Lam-Type C–S Coupling Reaction by Sodium Aryl Sulfinates and Organoboron Compounds
作者:Long Yin Lam、Cong Ma
DOI:10.1021/acs.orglett.1c02299
日期:2021.8.6
A Chan–Lam-type C–S coupling reaction using sodium aryl sulfinates has been developed to provide diaryl thioethers in up to 92% yields in the presence of a copper catalyst and potassium sulfite. Both electron-rich and electron-poor sodium aryl sulfinates and diverse organoboron compounds were tolerated for the synthesis of aryl and heteroaryl thioethers and dithioethers. The mechanistic study suggested