Nickel-Catalyzed Denitrogenative<i>ortho</i>-Arylation of Benzotriazinones with Organic Boronic Acids: an Efficient Route to Losartan and Irbesartan Drug Molecules
作者:Vijaykumar H. Thorat、Nitinkumar Satyadev Upadhyay、Chien-Hong Cheng
DOI:10.1002/adsc.201800923
日期:2018.12.21
Denitrogenative ortho‐arylation, vinylation and methylation of 1,2,3‐benzotriazin‐4‐(3H)‐ones with organic boronic acids catalyzed by nickel complexes to give a wide range of o‐substituted benzamides were demonstrated. Further, the catalytic reaction is successfully applied to the synthesis of the popular hypertensive drugs losartan and irbesartan in high yields.
Nickel-Catalyzed Denitrogenative Annulation of 1,2,3-Benzotriazin-4-(3<i>H</i>
)-ones with Benzynes for Construction of Phenanthridinone Scaffolds
作者:Vijaykumar H. Thorat、Nitinkumar Satyadev Upadhyay、Masahiro Murakami、Chien-Hong Cheng
DOI:10.1002/adsc.201701143
日期:2018.1.17
The synthesis of phenanthridinones via denitrogenative annulation of 1,2,3‐benzotriazin‐4‐(3H)‐ones with arynes catalysed by Ni(0)/dppm was successfully developed. A variety of phenanthridinones were prepared in good to excellent yields. Based on this method, nature product, N‐methylcrinasidine, was synthesized.
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.