The reactions of N‐sulfonylindoles with H‐phosphine oxides under oxidative conditions give a wide range of C‐3 phosphorylated free (NH)‐indoles. Several mild oxidants, such as AgNO3, di‐tert‐butyl peroxide (DTBP), and K2S2O8, can be used to promote this transformation.
在氧化条件下,N-磺酰吲哚与H-氧化膦的反应产生了多种C-3磷酸化的游离(NH)-吲哚。可以使用几种弱氧化剂,例如AgNO 3,过氧化二叔丁基(DTBP)和K 2 S 2 O 8来促进这种转化。
Electrochemically enabled chemoselective sulfonylation and hydrazination of indoles
作者:Yu-Zhen Zhang、Zu-Yu Mo、Heng-Shan Wang、Xiao-An Wen、Hai-Tao Tang、Ying-Ming Pan
DOI:10.1039/c9gc01201j
日期:——
We have developed electrochemically enabled chemoselective sulfonylation and hydrazination of C2,C3-unsubstituted indoles with arylsulfonyl hydrazide.
A novel electrochemical protocol for the oxidative cleavage of indoles has been developed, which offers a simple way to access synthetically useful anthranilic acid derivatives. In undivided cells, a wide variety of indoles and alcohol compounds are examined to afford amide ester aromatics without using extra oxidants and stoichiometric metal catalysts, which avoids the formation of undesired by-products
Direct C−H Phosphonylation of Electron-Rich Arenes and Heteroarenes by Visible-Light Photoredox Catalysis
作者:Rizwan S. Shaikh、Indrajit Ghosh、Burkhard König
DOI:10.1002/chem.201701283
日期:2017.9.7
the atom economy and allows preparing and modifying complex molecules more easily. . In contrast to the wide applications of aryl phosphonates, their synthesis via direct C-H bond phosphonylation is a less explored area. We report here a general, mild, and broadly applicable visible light photoredox C-H bond phosphonylation method for electron rich arenes and heteroarenes. The photoredox catalytic protocol