Redox-Triggered Switchable Synthesis of 3,4-Dihydroquinolin-2(1<i>H</i>)-one Derivatives via Hydride Transfer/<i>N</i>-Dealkylation/<i>N</i>-Acylation
作者:Xiaoyu Yang、Liang Wang、Fangzhi Hu、Lubin Xu、Sanming Li、Shuai-Shuai Li
DOI:10.1021/acs.orglett.0c03863
日期:2021.1.15
The switchable synthesis of 3-non, 3-mono, 3,3′-disubstituted 3,4-dihydroquinolin-2(1H)-ones was developed through a redox-neutral hydride-transfer/N-dealkylation/N-acylation strategy from o-aminobenzaldehyde with 4-hydroxycoumarin, and Meldrum’s acid, respectively. The unprecedented strategy for the synthesis of 3,3′-highly functionalized 3,4-dihydroquinolin-2(1H)-one has been realized with the in
Visible-light-induced transition metal and photosensitizer free decarbonylative addition of amino-arylaldehydes to ketones
作者:Yi Wang、Yatao Lang、Chao-Jun Li、Huiying Zeng
DOI:10.1039/d1sc06278f
日期:——
decarbonylative-coupling reaction is generally promoted by transition metals (via organometallic complexes) or peroxides (via radical intermediates), often at high temperatures to facilitate the CO release. Herein, a visible-light-induced, transition metal and external photosensitizer free decarbonylative addition of benzaldehydes to ketones/aldehydes at room temperature is reported. Tertiary/secondary alcohols were
脱羰基偶联反应通常由过渡金属(通过有机金属络合物)或过氧化物(通过自由基中间体),通常在高温下以促进 CO 释放。本文报道了一种在室温下由可见光诱导的、过渡金属和无外部光敏剂的苯甲醛与酮/醛脱羰基加成反应。通过在温和条件下使用 CsF,可以以中等至优异的产率获得叔/仲醇。详细的机理研究表明,该反应通过醛的光激发-脱羰生成芳香族阴离子,然后将其添加到酮/醛中。通过密度泛函理论(DFT)计算验证了反应机理。