A general nickel-catalyzed highly regioselective hydroarylation of unactivated alkenes enabled by the picolinamide auxiliary
作者:Lanlan Zhang、Chun Luo、Haoran Shi、Lin Zhu、Yuan-Qing Xu、Zhong-Yan Cao、Chao Wang
DOI:10.1039/d2cc04932e
日期:——
A practical method for regioselective hydroarylation of unactivated γ- or δ-vinyl alkylamines has been reported, enabling facile preparation of highly value-added ε- or ζ-aryl alkylamines.
Nickel-Catalyzed 1,2-Arylboration of Unactivated Alkenes to Access Boryl-Functionalized Aliphatic Amines
作者:Xiao Meng、Lin Zhu、Jimin Liang、Haoran Shi、Jun Lv、Mengbo Wang、Lanlan Zhang、Chao Wang
DOI:10.1021/acs.orglett.2c02768
日期:2022.9.30
1,2-arylboration of alkenyl amines bearing a cleavable picolinamide directing group. With aryl halides as electrophiles and B2Pin2 as nucleophiles, a wide range of alkenes could be converted into valuable boryl-functionalized aliphatic amines. The reaction proceeds with high levels of chemo- and regiocontrol and exhibits high functional group tolerance. In addition, the pinacol boronic ester group
我们在此报告了一种三组分 1,2-arylboration 的烯基胺,带有可裂解的吡啶酰胺导向基团。使用芳基卤化物作为亲电子试剂和 B 2 Pin 2作为亲核试剂,多种烯烃可以转化为有价值的硼基官能化脂肪胺。该反应以高水平的化学和区域控制进行,并表现出高官能团耐受性。此外,频哪醇硼酸酯基团可以进行各种转化,表明该协议可能为烯基胺的多功能区域选择性双功能化提供一个平台。
Iodination of Remote <i>Ortho</i>-C–H Bonds of Arenes via Directed S<sub>E</sub>Ar: A Streamlined Synthesis of Tetrahydroquinolines
作者:William A. Nack、Gang He、Shu-Yu Zhang、Chengxi Lu、Gong Chen
DOI:10.1021/ol4015078
日期:2013.7.5
A new strategy for the synthesis of tetrahydroquinolines (THQs) via the sequential functionalizations of remote C–H bonds is reported. This method uses a single picolinamide directing/protecting group to effect Pd-catalyzed γ-C(sp3)–H arylation, metal-free ε-C(sp2)–H iodination, and Cu-catalyzed intramolecular C–N cross-coupling. The overall sequence is efficient and versatile, and offers a streamlined
作者:Daniel H. O’ Donovan、Claudia De Fusco、David R. Spring
DOI:10.1016/j.tetlet.2016.05.068
日期:2016.7
Treatment of picolinic amides with excess zinc in aqueous hydrochloric acid at room temperature affords the corresponding amines in good to excellent yields. The mild reaction conditions exhibit useful functional group tolerance and facilitate the application of the picolinic amide moiety as a protecting group which can be easily introduced and selectively removed.