Potassium Iodide/
<i>tert</i>
‐Butyl Hydroperoxide‐Mediated Oxidative Annulation for the Selective Synthesis of
<i>N</i>
‐Substituted 1,2,3‐Benzotriazine‐4(3
<i>H</i>
)‐ones Using Nitromethane as the Nitrogen Synthon
作者:Yizhe Yan、Bin Niu、Kun Xu、Jianhua Yu、Huanhuan Zhi、Yanqi Liu
DOI:10.1002/adsc.201500619
日期:2016.1.21
A novel and efficient oxidative annulation of 2‐aminobenzamides with nitromethane has been developed for the chemoselective synthesis of N‐substituted 1,2,3‐benzotriazine‐4(3H)‐ones in moderate to excellent yields under transition metal‐free conditions. Two NN bonds were constructed in one pot via CN cleavage of nitromethane, which was selectively employed as the nitrogen synthon. The preliminary
1,2,3-Benzotriazin-4(3H)-ones and 1,2,3,4-benzothiatriazine 1,1(2H)-dioxide reacted with isocyanides in the presence of a palladium catalyst to give 3-(imino)isoindolin-1-ones and 3-(imino)thiaisoindoline 1,1-dioxides, respectively, in high yield. An intermediate azapalladacycle was generated through denitrogenation of the triazine moiety, and an isocyanide was incorporated therein.
Electrochemical annulation of 1,2,3-benzotriazinones with alkynes to access isoquinolin-1(2<i>H</i>)-ones
作者:JinKang Chen、Linxia Xiao、Liang Qi
DOI:10.1039/d3ob01161e
日期:——
for electrochemical radical cascade annulation of 1,2,3-benzotriazinones with alkynes is described. Under catalyst-free and external reductant-free electrolysis conditions, a range of isoquinolin-1(2H)-ones were obtained in moderate to good yields. Cyclic voltammetry and control studies suggest that the reaction proceeds via a radical pathway. Furthermore, this approach could be easily scaled up.
描述了 1,2,3-苯并三嗪酮与炔烃的电化学自由基级联成环的环保方法。在无催化剂和无外部还原剂的电解条件下,以中等至良好的收率获得了一系列异喹啉-1(2 H )-酮。循环伏安法和对照研究表明该反应通过自由基途径进行。此外,这种方法可以很容易地扩大规模。
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。