Copper-Catalyzed Remote C–H Functionalizations of Naphthylamides through a Coordinating Activation Strategy and Single-Electron-Transfer (SET) Mechanism
作者:Jun-Ming Li、Yong-Heng Wang、Yang Yu、Rui-Bo Wu、Jiang Weng、Gui Lu
DOI:10.1021/acscatal.6b03671
日期:2017.4.7
carbon–hydrogen (C–H) functionalization reactions. Herein, the copper-catalyzed and picolinamide-assisted remote p-C–H sulfonylation of 1-naphthylamides was realized. The synthetic utility of this method was further examined by sequential functionalizations and the efficient synthesis of the pharmaceutically useful 5-HT6 serotonin receptor ligand. This approach also provided a general strategy for other p-C–H bond
实现p -C Ar -H的位点选择性是直接碳氢(C–H)官能化反应的主要挑战之一。在此,实现了铜催化和吡啶甲酰胺辅助的1-萘甲酰胺的远程p -CH磺酰化。通过顺序功能化和药物合成的5-HT 6血清素受体配体的有效合成,进一步检查了该方法的合成效用。这种方法还提供了一个总体战略的其他p-C–H键功能化,例如C–O,C–Br,C–I,CC和C–N键的高选择性结构。控制实验和理论计算表明,该C–H磺酰化反应可能会通过单电子转移过程进行。
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。
Synergistic combination of visible-light photo-catalytic electron and energy transfer facilitating multicomponent synthesis of β-functionalized α,α-diarylethylamines
作者:Yanan Wu、Yipin Zhang、Mingjie Jiang、Xunqing Dong、Hitesh B. Jalani、Guigen Li、Hongjian Lu
DOI:10.1039/c9cc02465d
日期:——
combination of electron and energy transfer processes has been developed. The mild reaction conditions allow the radical–radical cross-coupling phenomenon for the multicomponent synthesis of β-arylsulfonyl(diarylphosphinoyl)-α,α-diarylethyl-amines from readily available arylsulfinic acids (diarylphosphine oxides), 1,1-diarylethylenes and arylazides.
Sodium iodide-mediated synthesis of vinyl sulfides and vinyl sulfones with solvent-controlled chemical selectivity
作者:Congrong Liu、Jin Xu、Gongde Wu
DOI:10.1039/d1ra07086j
日期:——
Vinyl sulfides and vinyl sulfones are ubiquitous structures in organic chemistry because of their presence in natural and biologically active compounds and are very frequently encountered structural motifs in organic synthesis. Herein we report an efficient synthesis of vinyl sulfides and vinyl sulfones via transition metal-free sodium iodide-mediated sulfenylation of alcohols and sulfinic acids with
Divergent reactivity of sulfinates with pyridinium salts based on one- <i>versus</i> two-electron pathways
作者:Myojeong Kim、Euna You、Seongjin Park、Sungwoo Hong
DOI:10.1039/d1sc00776a
日期:——
is to develop distinct reaction pathways from identical starting materials for the efficient synthesis of diverse compounds. Herein, we disclose the unique divergent reactivity of the combination sets of pyridiniumsalts and sulfinates to achieve sulfonative pyridylation of alkenes and direct C4-sulfonylation of pyridines by controlling the one- versus two-electron reaction manifolds for the selective