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。