Manganese-Catalyzed <i>ortho</i>-C-H Amidation of Weakly Coordinating Aromatic Ketones
作者:Xianqiang Kong、Bo Xu
DOI:10.1021/acs.orglett.8b01770
日期:2018.8.3
An efficient manganese-catalyzed ortho-C-H amidation of weakly coordinating aromaticketones using the readily available sulfonyl azide as the amination reagent is developed. The key step is the ketone directed aromatic metalation using the in situ generated reactive Mn intermediate, MnMe(CO)5. This method offers excellent chemical yields, high regioselectivities, and good functional group tolerance
Electrochemical intramolecular N(sp<sup>2</sup>)–H/N(sp<sup>3</sup>)–H coupling for the synthesis of 1<i>H</i>-indazoles
作者:Qiang Zhong、Pei-Long Wang、Hui Gao、Fang Ma、Youqing Yang、Hongji Li
DOI:10.1039/d3gc00380a
日期:——
The electrochemical synthesis of 1H-indazoles via an intramolecular N(sp2)–H/N(sp3)–H coupling reaction at room temperature is first described. The transition metal-free electrochemical cyclization features the use of commercially available NH3 as the nitrogen source and a broad substrate scope, thus affording a wide range of substituted 1H-indazoles in moderate to good yields. Both the control experiments