Abstract The recent molecular iodine catalyzed [1,2]-rearrangement of aryl amines and 3-amino-1H-indazolesfor the synthesis of 1,2,3-benzotriazines is highlighted.
Oxidative Rearrangement of 3-Aminoindazoles for the Construction of 1,2,3-Benzotriazine-4(3<i>H</i>)-ones at Ambient Temperature
作者:Yao Zhou、Ya Wang、Yixian Lou、Qiuling Song
DOI:10.1021/acs.orglett.8b02813
日期:2018.10.19
A novel oxidative rearrangement of 3-aminoindazoles is reported, enabling the production of diverse functionalized 1,2,3-benzotriazine-4(3H)-ones in good yields at room temperature. The key success of this unprecedented transformation of 3-aminoindazoles is the use of water as cosolvent, which could facilitate the halogen-induced ring expansion of 3-aminoindazoles under oxidative conditions.
Iodine-catalysed N-centered [1,2]-rearrangement of 3-aminoindazoles with anilines: efficient access to 1,2,3-benzotriazines
作者:Jie Ren、Xinxin Yan、Xiaofan Cui、Chao Pi、Yangjie Wu、Xiuling Cui
DOI:10.1039/c9gc03567b
日期:——
A straightforward and synthetically valuable approach for the synthesis of 1,2,3-benzotriazines has been developed via iodine-catalysed N-centered [1,2]-rearrangement of 3-aminoindazoles with anilines. This reaction tolerated a wide scope of substrates under simple reaction conditions employing I2 as a cheap catalyst.