methodology. Molecular structure of a representative compound was confirmed by single crystal X-ray diffraction study. The scope and limitations of this reaction is discussed. Some of the compounds synthesized were tested for chorismatemutase inhibitory properties in vitro. The in vitro dose response study of an active compound is presented.
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.
Trifluoroacetic Acid-Mediated Denitrogenative <i>ortho</i>-Hydroxylation of 1,2,3-Benzotriazin-4(3<i>H</i>)-ones: A Metal-Free Approach
作者:Kanagaraj Madasamy、Madasamy Hari Balakrishnan、Ramaraju Korivi、Subramaniyan Mannathan
DOI:10.1021/acs.joc.2c00354
日期:2022.7.1
An efficient trifluoroacetic acid-mediated denitrogenative hydroxylation of 1,2,3-benzotriazin-4(3H)-ones is described. This metal-free approach is compatible with a wide range of 1,2,3-benzotriazin-4(3H)-ones, affording ortho-hydroxylated benzamides in good to high yields with a short reaction time. The reaction is believed to proceed via a benzene diazonium intermediate. The synthetic utility of
描述了一种有效的三氟乙酸介导的 1,2,3-benzotriazin-4(3 H )-ones 的脱氮羟基化。这种不含金属的方法与多种 1,2,3-benzotriazin-4(3 H )-one相容,可在较短的反应时间内以良好至高产率提供邻羟基化苯甲酰胺。据信该反应通过苯重氮中间体进行。该反应的合成效用通过以良好收率制备抗微生物药物利肝素 C 和苯并恶嗪-2,4(3 H )-二酮类化合物得到成功证明。
Regioselective Synthesis of 3‐Substituted Isocoumarin‐1‐imines via Palladium‐Catalyzed Denitrogenative Transannulation of 1,2,3‐Benzotriazin‐4(3<i>H</i>)‐ones and Terminal Alkynes
作者:Madasamy Hari Balakrishnan、Popuri Sureshbabu、Ramaraju Korivi、Subramaniyan Mannathan
DOI:10.1002/asia.202300726
日期:2023.11.2
An efficient palladium-catalyzed denitrogenative transannulation strategy to access various 3-substituted isocoumarin-1-imine frameworks using 1,2,3-benzotriazin-4(3H)-ones and terminal alkynes is described.