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.
Synthesis of <i>ortho</i>-arylated and alkenylated benzamides by palladium-catalyzed denitrogenative cross-coupling reactions of 1,2,3-benzotriazin-4(3<i>H</i>)-ones with organoboronic acids
作者:Madasamy Hari Balakrishnan、Madasamy Kanagaraj、Velayudham Sankar、Mahesh Kumar Ravva、Subramaniyan Mannathan
DOI:10.1039/d1nj03706d
日期:——
established by using phenyl boronate ester as the coupling partner. The reaction is believed to proceed via a five-membered aza-palladacyclic intermediate. DFT calculations were studied comparing the reactivity of palladium and nickel complexes in the five-membered aza-metallacycle formation from 1,2,3-benzotriazin-4(3H)-ones. The application of the reaction was successfully demonstrated by converting ortho-alkenylated
描述了一种有效的钯催化脱氮 Suzuki-Miyaura 型 1,2,3-苯并三嗪-4(3 H )-酮与有机硼酸的交叉偶联。该反应与各种芳基和烯基硼酸相容,以良好至高产率提供邻芳基化和烯基化苯甲酰胺。还成功地使用了杂芳族硼酸。与此同时,通过使用苯基硼酸酯作为偶联伙伴建立了偶联反应。据信该反应通过五元氮杂-钯环中间体进行。研究了 DFT 计算,比较了钯和镍配合物在 1,2,3-苯并三嗪-4(3 H)-那些。通过还原反应将邻-烯基化产物以高产率转化为邻-烷基化产物,成功地证明了该反应的应用。
TBAB-Mediated Radical 5<i>-exo-trig ipso</i>
-Cyclization of 2-Arylbenzamide for the Synthesis of Spiro[cyclohexane-1,1′-isoindoline]-2,5-diene-3′,4-dione
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。