作者:Alonso, Belén、Radivoy, Gabriel、Mancebo-Aracil, Juan
DOI:10.1016/j.mcat.2024.114475
日期:——
Transition metal catalysts supported on natural materials offer promising avenues for sustainable organic synthesis. In this study, we present the synthesis, characterisation, and catalyticperformance of copper nanoparticles supported on montmorillonite K10 (CuMK10) as a heterogeneous catalyst for hydroamination reactions. CuMK10, synthesised through a robust and established nanoparticle synthesis methodology
Nitrosobenzene-Mediated C−C Bond Cleavage Reactions and Spectral Observation of an Oxazetidin-4-one Ring System
作者:Joshua N. Payette、Hisashi Yamamoto
DOI:10.1021/ja804325f
日期:2008.9.17
remain relatively undeveloped. We report a novel, transition-metal-free oxidative C-C bond cleavage process for a broad range of ester and dicarbonyl compounds involving carbanion addition to nitrosobenzene. ReactIR experiments on the nitrosobenzene-mediated oxidative decarboxylation of esters indicate the reaction proceeds via fragmentation of a previously unobserved oxazetidin-4-one heterocycle, characterized
虽然键形成过程传统上引起了化学界的关注,但促进键断裂的方法仍然相对不发达。我们报告了一种新颖的、无过渡金属的氧化 CC 键裂解过程,用于广泛的酯和二羰基化合物,包括碳负离子加成到亚硝基苯。对亚硝基苯介导的酯类氧化脱羧反应的 ReactIR 实验表明,该反应是通过先前未观察到的 oxazetidin-4-one 杂环的断裂而进行的,其特征是在 1846 cm-1 处具有强烈的 IR 拉伸频率。这些机理研究允许该协议进一步扩展到各种 β-酮酯和 1,3-二酮底物的酮裂解反应。
Synthesis of α-Hydroxyl and α-Amino Pyridinyl Esters via Photoreductive Dual Radical Cross-Coupling
作者:Xian-Chao Cui、Hu Zhang、Hao Zhang、Yi-Ping Wang、Jian-Ping Qu、Yan-Biao Kang
DOI:10.1021/acs.orglett.3c02780
日期:2023.10.6
A method for the synthesis of α-hydroxyl and α-amino pyridinyl esters via photoreductive dual radical cross-coupling catalyzed by the super-organoreductant CBZ6 has been developed. A wide range of 2-pyridinylation and 4-pyridinylation of either α-ketoesters or imine derivatives has been achieved. The applications in the synthesis of pyridinyl amino-hydroxyl acids as well as a new chiral oxazoline ligand