Facile synthesis of carbamoylated benzimidazo[2,1-<i>a</i>]isoquinolin-6(5<i>H</i>)-ones <i>via</i> radical cascade cyclization under metal-free conditions
作者:Qi Liu、Lei Wang、Jie Liu、Shuchen Ruan、Pinhua Li
DOI:10.1039/d1ob00101a
日期:——
An efficient synthesis of carbamoylated benzimidazo[2,1-a]isoquinolin-6(5H)-ones from 2-arylbenzoimidazoles and oxamic acids was developed under metal-free conditions with good product yields.
Silver-catalysed double decarboxylative addition–cyclisation–elimination cascade sequence for the synthesis of quinolin-2-ones
作者:C. Munashe Mazodze、Wade F. Petersen
DOI:10.1039/d2ob00521b
日期:——
An atom-efficient silver-catalysed double carboxylative strategy for the one-step synthesis of quinolin-2-ones via an addition–cyclisation–elimination cascade sequence of oxamic acids to acrylic acids, mediated either thermally or photochemically, is reported. The reaction was applicable to the synthesis of a broad range of quinolin-2-ones and featured a double-disconnection approach that constructed
Photoredox One-Pot Synthesis of 3,4-Dihydroquinolin-2(1H)-ones
作者:Jianxin Shou、Gaofeng Feng、Jing-Yao He、Qi-Fan Bai、Xuewen Li
DOI:10.1055/s-0041-1737910
日期:2022.4
efficient accessing 3,4-dihydroquinolin-2(1H)-ones from anilines, oxalyl chloride, and electron-deficient alkenes is disclosed. The new approach features excellent synthetic efficiency, readily available starting materials, and simple operations. It is compatible with a variety of anilines and electron-deficient alkenes. A broad array of 3,4-dihydroquinolin-2(1H)-ones were prepared.
公开了一种从苯胺、草酰氯和缺电子烯烃中高效获取 3,4-二氢喹啉-2(1 H )-酮的光氧化还原一锅法。新方法具有优异的合成效率、易于获得的起始材料和简单的操作。它与多种苯胺和缺电子烯烃相容。制备了大量的 3,4-二氢喹啉-2(1 H )-酮。
Decarboxylative Nickel- and Photoredox-Catalyzed Aminocarbonylation of (Hetero)Aryl Bromides
nickel-catalyzed aminocarbonylation of (hetero)aryl bromides was developed. The utilization of readily available oxamic acids, the application of a broadly used organic photoredox catalyst (4CzIPN), and mild reaction conditions make this transformation an appealing alternative to classical amidation procedures. The generation of carbamoyl radicals was supported by trapping reactions with a hydrogen
开发了一种用于(杂)芳基溴的光氧化还原和镍催化氨基羰基化的有效方法。利用容易获得的草酸、广泛使用的有机光氧化还原催化剂 (4CzIPN) 和温和的反应条件,使这种转化成为经典酰胺化程序的有吸引力的替代方案。在 D 2 O 存在下,通过与氢原子转移催化剂的捕获反应支持氨基甲酰基自由基的产生,产生氘代甲酰胺。对于各种草酸,证实了该氘化方案的通用性。