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
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.
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
Nickel-Catalyzed Cross-Electrophile Coupling of 1,2,3-Benzotriazin-4(3<i>H</i>)-ones with Aryl Bromides
作者:Tingzhi Lin、Yan-En Wang、Ning Cui、Miaohui Li、Rui Wang、Jiahui Bai、YiRan Fan、Dan Xiong、Fei Xue、Patrick J. Walsh、Jianyou Mao
DOI:10.1021/acs.joc.2c02246
日期:2022.12.16
The nickel-catalyzed cross-electrophile coupling of 1,2,3-benzotriazin-4(3H)-ones with arylbromides to generate a diverse array of ortho-arylated benzamide derivatives has been developed. The reaction displayed good functional group tolerance with Zn as the reductant. The key to this transformation is the ring opening of benzotriazinones, which undergo a denitrogenative process to obtain various benzamide
已经开发了镍催化的 1,2,3-苯并三嗪-4(3 H )-与芳基溴的交叉亲电子偶联,以生成多种邻芳基化苯甲酰胺衍生物。该反应以 Zn 作为还原剂显示出良好的官能团耐受性。这种转化的关键是苯并三嗪酮的开环,它经过脱氮过程以获得各种苯甲酰胺衍生物(29 个例子,42-93% 产率)。证明了这种转变的可扩展性。