在此,我们报道了第一个可见光光氧化还原催化芳基环氧化物与 CO 的羧化反应来合成羟基酸衍生物。在温和条件下以中等到高产率获得多种有价值的β-、γ-、δ-、ε-羟基酸衍生物。该方案显示出值得注意的官能团相容性,在无过渡金属条件下具有高化学和区域选择性,并使用廉价的有机染料作为光敏剂。机理研究表明,苄基碳负离子是作为顺序单电子转移(SSET)过程的中间产物而产生的。
Copper-catalyzed aerobic oxidative cleavage of C–C bonds in epoxides leading to aryl nitriles and aryl aldehydes
作者:Lijun Gu、Cheng Jin
DOI:10.1039/c5cc00360a
日期:——
Novel copper-catalyzedaerobic synthesis of aryl nitriles and aldehydes from epoxides via C-C single bond cleavage has been discovered. This reaction provides a practical method toward the synthesis of aryl nitriles and aldehydes, which are versatile intermediates and building blocks in organic synthesis.
A sterically encumbered photoredox catalyst enables the unified synthesis of the classical lignan family of natural products
作者:Edwin Alfonzo、Aaron B. Beeler
DOI:10.1039/c9sc02682g
日期:——
selectively generate carbonyl ylides from electron-rich epoxides. These can undergo concerted [3 + 2] dipolarcycloadditions to afford tetrahydrofurans, which were advanced (2–4 steps) to at least one representative natural product or natural product scaffold within all six subtypes in classical lignans. The application of those synthetic blueprints to the synthesis of heterolignans bearing unnatural
Herein, we report the first visible-lightphotoredox-catalyzedcarboxylation of arylepoxides with CO to synthesize hydroxy acid derivatives. A variety of valuable β-, γ-, δ-, ε‑hydroxy acid derivatives are obtained in moderate to high yields under mild conditions. This protocol shows noteworthy functional-group compatibility, high chemo- and regioselectivities under transition-metal-free conditions
在此,我们报道了第一个可见光光氧化还原催化芳基环氧化物与 CO 的羧化反应来合成羟基酸衍生物。在温和条件下以中等到高产率获得多种有价值的β-、γ-、δ-、ε-羟基酸衍生物。该方案显示出值得注意的官能团相容性,在无过渡金属条件下具有高化学和区域选择性,并使用廉价的有机染料作为光敏剂。机理研究表明,苄基碳负离子是作为顺序单电子转移(SSET)过程的中间产物而产生的。