摘要 N-氟苯磺酰亚胺(NFSI)通过钯催化以中等到良好的产率实现了2-芳基苯并[ d ]恶嗪酮的单氟化。在硝酸盐的促进下,该反应提供了经济和环境友好的策略。单氟2-芳基苯并[ d ]恶嗪酮的合成与许多常见的官能团具有良好的相容性。讨论了这种单氟化的可能机理。 N-氟苯磺酰亚胺(NFSI)通过钯催化以中等到良好的产率实现了2-芳基苯并[ d ]恶嗪酮的单氟化。在硝酸盐的促进下,该反应提供了经济和环境友好的策略。单氟2-芳基苯并[ d ]恶嗪酮的合成与许多常见的官能团具有良好的相容性。讨论了这种单氟化的可能机理。
One-pot approach to 2-arylbenzoxazinone derivatives from 2-alkynylanilines using copper-mediated tandem reactions
作者:Mitsuaki Yamashita、Akira Iida
DOI:10.1016/j.tet.2014.06.056
日期:2014.9
describe a one-pot method to obtain a variety of 2-arylbenzoxazinones and N-benzoyl anthranilic acid by using a copper catalyst and molecular oxygen as oxidants. This protocol involves tandem cyclization and oxidative processes of 2-alkynylanilines to afford significant motifs in synthetic and medicinal chemistry with moderate yields. We also demonstrated that combining the Sonogashiracoupling and the
Recyclable Heterogeneous Palladium-Catalyzed Carbonylative Cyclization of 2-Iodoanilines with Aryl Iodides Leading to 2-Arylbenzoxazinones
作者:Zhaotao Xu、Bin Huang、Zebiao Zhou、Mingzhong Cai
DOI:10.1055/s-0039-1690265
日期:2020.2
A highly efficient and practical heterogeneous palladium-catalyzedcarbonylative coupling of 2-iodoanilines with aryl iodides has been developed. The reaction occurs smoothly in toluene at 110 °C with N,N-diisopropylethylamine as base under carbon monoxide (5 bar) and offers a general and powerful tool for the construction of various valuable 2-arylbenzoxazinones with excellent atom-economy, high functional
Direct activation of sp2 C–H bonds by a palladium catalyst has received significant attention in organic chemistry. However, most of these C–Hactivation reactions are carried out in hazardous solvents. Herein we report a novel solvent-free direct sp2 C–Hbond functionalization (oxygenation) method using Pd(II)/Al2O3 catalysis of oxo-benzoxazine derivatives with good to excellent yields, and demonstrate
钯催化剂直接活化sp 2 C-H键在有机化学中受到了广泛关注。然而,大多数这些 C-H 活化反应是在危险溶剂中进行的。在此,我们报道了一种使用 Pd( II )/Al 2 O 3催化氧代苯并恶嗪衍生物的新型无溶剂直接 sp 2 C-H 键官能化(氧化)方法,并证明了其在合成药学上重要的化合物。
Pd‐Catalyzed Carbonylative Synthesis of 4
<i>H</i>
‐Benzo[
<i>d</i>
][1,3]Oxazin‐4‐Ones Using Benzene‐1,3,5‐Triyl Triformate as the CO Source
作者:Yan Zheng、Mengke Dong、Erdong Qu、Jin Bai、Xiao‐Feng Wu、Wanfang Li
DOI:10.1002/chem.202103137
日期:2021.11.22
A Pd-catalyzed CO-free carbonylative synthesis of 4H-benzo[d][1,3]oxazin-4-one derivatives was developed. This new method employed readily available N-(o-bromoaryl)amides as the starting materials and inexpensive benzene-1,3,5-triyl triformate (TFBen) as the stable solid CO surrogate, which would not cause hydrodehalogenation of the starting materials. Remarkably, this method featured a very broad
开发了 Pd 催化的 4 H -benzo[ d ][1,3]oxazin-4-one 衍生物的无 CO 羰基化合成。这种新方法使用容易获得的N -(邻溴芳基)酰胺作为起始原料,使用廉价的三甲酸苯-1,3,5-三酯(TFBen)作为稳定的固体 CO 替代物,不会引起起始原料的加氢脱卤。值得注意的是,该方法具有非常广泛的底物范围,特别适用于将苯并[ d ][1,3]oxazin-4-one结构引入药物和天然生物活性化合物中。