Visible-light-induced denitrogenative phosphorylation of benzotriazinones: a metal- and additive-free method for accessing <i>ortho</i>-phosphorylated benzamide derivatives
3-benzotriazinones was achieved. With the use of eosin Y as a photoredox catalyst, N,N-diisopropylethylamine as a base, CH3CN–H2O as a solvent and sunlight or a blue LED as a light source, a variety of aryl-phosphonates, aryl-phosphinates, and aryl-phosphine oxides were efficiently prepared. In addition, B2pin2 instead of P-nucleophiles as a radical acceptor was also demonstrated. The key advantages of this
NaNO2/I2 as an alternative reagent for the synthesis of 1,2,3-benzotriazin-4(3H)-ones from 2-aminobenzamides
作者:Dinesh S. Barak、Sushobhan Mukhopadhyay、Dipak J. Dahatonde、Sanjay Batra
DOI:10.1016/j.tetlet.2018.12.025
日期:2019.1
An efficient transformation of 2-aminobenzamides to 1,2,3-benzotriazin-4(3H)-ones in the presence of sodium nitrite (NaNO2) and Iodine (I2) is described. The reaction is proposed to proceed via formation of nitrosyl halide that induces nitrosylation of the amino group of 2-aminobenzamide leading to diazotization followed by intramolecular cyclization.
Palladium-catalyzed denitrogenation/vinylation of benzotriazinones with vinylene carbonate
作者:Jiang Nan、Qiong Huang、Xinran Men、Shuai Yang、Jing Wang、Yangmin Ma
DOI:10.1039/d4cc00059e
日期:——
Herein, a novel Pd-catalyzed denitrogenation/vinylation of benzotriazinones using vinylenecarbonate as the vinylation reagent is reported. This transformation demonstrates an unprecedented skeletal editing approach, effectively converting NN to CC fragments in situ and synthesizing a collection of isoquinolinones with broad-spectrum functional group tolerance. Moreover, the quite concise reaction
在此,报道了一种使用碳酸亚乙烯酯作为乙烯基化试剂的新型钯催化苯并三嗪酮脱氮/乙烯基化反应。这种转变展示了前所未有的骨骼编辑方法,有效地将 N N 至 C C原位片段并合成一系列具有广谱官能团耐受性的异喹啉酮。此外,相当简洁的反应体系和生物活性分子的后期修饰全面强调了该方案的实际潜力。
Mild and efficient TBAI-catalyzed synthesis of 1,2,3-benzotriazine-4-(3 H )-ones from tert -butyl nitrite and 2-aminobenzamides under acid-free conditions
作者:Yizhe Yan、Hongyi Li、Bin Niu、Changrui Zhu、Ting Chen、Yanqi Liu
DOI:10.1016/j.tetlet.2016.07.102
日期:2016.9
A facile and efficient annulation of 2-aminobenzamides and tert-butyl nitrite was developed, affording 1,2,3-benzotriazine-4-(3H)-ones in good yields under mild conditions. Notably, the reaction was carried out in the absence of strong acid and tert-butyl nitrite was employed as the nitrogen source. (C) 2016 Elsevier Ltd. All rights reserved.