Nitrosonium Ion Catalyzed Oxidative Bromination of Arenes

被引:2
|
作者
Chen, Pin-Hsien [1 ]
Hsu, Shu-Jung [1 ]
Hou, Duen-Ren [1 ]
机构
[1] Natl Cent Univ, Dept Chem, 300 Jhong Da Rd, Taoyuan 320317, Taiwan
关键词
nitrosonium; bromination; arene; metal-free reaction; ESTROGEN-RECEPTOR MODULATOR; ELECTRON-TRANSFER; AROMATIC BROMINATION; ARYL; HALOGENATION; NITROSATION; CONVENIENT; NITRATION; EFFICIENT; BROMIDE;
D O I
10.1002/adsc.202301200
中图分类号
O69 [应用化学];
学科分类号
081704 ;
摘要
A nitrosonium catalyzed bromination of electron-rich arenes has been developed, using bromide salts as bromine sources, oxygen gas as a terminal oxidant and Bronsted acids (sulfuric acid, TFA or HBr). This arene bromination process is free of transition metals, proceeding in acetic acid and under mild temperatures (25-50 degrees C) to give brominated arenes with good to excellent yields. Our mechanistic studies indicated that this oxidative bromination of arenes reaction is catalyzed by nitrosnium ion (NO+), without the involvement of Br2 or Br+. The kinetic isotope effect of this reaction was measured using pentadeuteriophenyl phenyl ether (kH/kD=1.1). image
引用
收藏
页码:1575 / 1582
页数:8
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