Visible-Light-Promoted C2 Selective Arylation of Quinoline and Pyridine <i>N</i>-Oxides with Diaryliodonium Tetrafluoroborate
作者:Dazhi Li、Ce Liang、Zaixing Jiang、Junzheng Zhang、Wang-Tao Zhuo、Fan-Yue Zou、Wan-Peng Wang、Guo-Lin Gao、Jinzhu Song
DOI:10.1021/acs.joc.9b02933
日期:2020.2.21
visible-light-promoted C2 selective arylation of quinoline and pyridineN-oxides, with diaryliodonium tetrafluoroborate as an arylation reagent, using eosin Y as a photocatalyst for the construction of N-heterobiaryls was presented. This methodology provided an efficient way for the synthesis of 2-aryl-substituted quinoline and pyridineN-oxides. This strategy has the following advantages: specific regioselectivity
COLONNA M.; GRECI L.; POLONI M., J. HETEROCYCL. CHEM., 1980, 17, NO 7, 1473-1477
作者:COLONNA M.、 GRECI L.、 POLONI M.
DOI:——
日期:——
Palladium-Catalyzed C−H Functionalization of Pyridine <i>N</i>-Oxides: Highly Selective Alkenylation and Direct Arylation with Unactivated Arenes
作者:Seung Hwan Cho、Seung Jun Hwang、Sukbok Chang
DOI:10.1021/ja8026295
日期:2008.7.1
Two catalytic protocols of the oxidative C-C bond formation have been developed on the basis of the C-H bond activation of pyridine N-oxides. Pd-catalyzed alkenylation of the N-oxides proceeds with excellent regio-, stereo-, and chemoselectivity, and the corresponding ortho-alkenylated N-oxide derivatives are obtained in good to excellent yields. Direct cross-coupling reaction of pyridine N-oxides
在吡啶 N-氧化物的 CH 键活化的基础上开发了两种氧化 CC 键形成的催化方案。Pd 催化的 N-氧化物的烯基化以优异的区域选择性、立体选择性和化学选择性进行,并且相应的邻位烯基化 N-氧化物衍生物以良好到优异的产率获得。在 Pd 催化剂和 Ag 氧化剂的存在下,还开发了吡啶 N-氧化物与未活化芳烃的直接交叉偶联反应,这提供了具有高位点选择性的邻芳基化吡啶 N-氧化物产物。
Colonna, Martino; Greci, Lucedio; Poloni, Marino, Journal of Heterocyclic Chemistry, 1980, vol. 17, p. 1473 - 1477