Copper Triflate Mediated α-Monohalogenation of α-Diazo β-Ketosulfones with Ammonium Halides
作者:Ru-Ting Hsu、Meng-Yang Chang、Chieh-Kai Chan、Heui-Sin Wang
DOI:10.1055/s-0036-1589479
日期:——
Abstract Copper triflate mediated α-monohalogenation of α-diazo β-ketosulfones with ammonium halides provides the corresponding α-halo β-ketosulfones. Different metal triflates are investigated for this facile and efficient transformation. A plausible mechanism is proposed. Copper triflate mediated α-monohalogenation of α-diazo β-ketosulfones with ammonium halides provides the corresponding α-halo
[3 + 3]-Cycloaddition of α-Diazocarbonyl Compounds and <i>N</i>-Tosylaziridines: Synthesis of Polysubstituted 2<i>H</i>-1,4-Oxazines through Synergetic Catalysis of AgOTf/Cu(OAc)<sub>2</sub>
作者:Shangwen Fang、Yanwei Zhao、Haiyan Li、Yonggao Zheng、Pengcheng Lian、Xiaobing Wan
DOI:10.1021/acs.orglett.9b00632
日期:2019.4.5
An impressive and new [3 + 3]-cycloaddition of α-diazocarbonyl compounds with N-tosylaziridines via synergetic catalysis of AgOTf and Cu(OAc)2 has been well described, which offers efficient access to highly substituted 2H-1,4-oxazine derivatives. A variety of α-diazocarbonyl compounds and N-tosylaziridines were compatible substrates with convenient operations under mild reaction conditions.
已经很好地描述了通过AgOTf和Cu(OAc)2的协同催化,α-重氮羰基化合物与N-甲苯磺酰氮丙啶类化合物令人印象深刻且新颖的[3 + 3]-环加成反应,该反应可有效地获得高度取代的2 H -1,4-恶嗪衍生物。多种α-重氮羰基化合物和N-甲苯磺酰基氮丙啶是相容的底物,在温和的反应条件下操作方便。
Amidines for Versatile Cobalt(III)-Catalyzed Synthesis of Isoquinolines through C–H Functionalization with Diazo Compounds
A cobalt(III)-catalyzed C–H/N–H bond functionalization for the synthesis of 1-aminoisoquinolines from aryl amidines and diazo compounds has been developed. The reaction proceeds under mild reaction conditions, obviates the need for oxidants, produces only N2 and H2O as the byproducts, and features a broad substrate scope.
已经开发了钴(III)催化的CH / N / H键官能团,用于从芳基am和重氮化合物合成1-氨基异喹啉。反应在温和的反应条件下进行,消除了对氧化剂的需求,仅产生副产物N 2和H 2 O,并且具有广泛的底物范围。
Synthesis of Polysubstituted Phenols by Rhodium‐Catalyzed C−H/Diazo Coupling and Tandem Annulation
作者:Min Liu、Kelu Yan、Jiangwei Wen、Xue Li、Xiaoyu Wang、Fengjie Lu、Xiu Wang、Hua Wang
DOI:10.1002/adsc.202001456
日期:2021.3.29
rhodium(III)‐catalyzed C−H/diazo coupling and tandem annulation of 3‐oxopent‐4‐enenitriles have been proposed for the synthesis of polysubstituted phenols. Most products of phenols are obtained in good yields. Several preliminary mechanistic studies and derivatization reactions of phenol products were also performed. This method offers an alternative approach for the synthesis of useful diverse phenols.
Regioselective synthesis of multisubstituted isoquinolones and pyridones via Rh(<scp>iii</scp>)-catalyzed annulation reactions
作者:Liangliang Shi、Ke Yu、Baiquan Wang
DOI:10.1039/c5cc05977a
日期:——
A mild and efficient Rh(III)-catalyzedregioselective synthesis of isoquinolones and pyridones has been developed. The protocol uses readily available N-methoxybenzamide or N-methoxymethacrylamide and diazo compounds as the starting materials. The...