The synergistic effect of self-assembly and visible-light induced the oxidative C–H acylation of N-heterocyclic aromatic compounds with aldehydes
作者:Lingling Zhang、Guoting Zhang、Yongli Li、Shengchun Wang、Aiwen Lei
DOI:10.1039/c8cc02342e
日期:——
between two hydrocarbon compounds is regarded as a foundational issue in green chemistry. High atom-economy and mild conditions are long term pursued goals in this field. Herein, we developed a visible-light mediated direct cross-coupling between N-heterocycles and aldehydes without the requirement of a photocatalyst. Several N-heterocycles afforded the acylation products with aromatic or aliphatic aldehydes
Minisci aroylation of N-heterocycles using choline persulfate in water under mild conditions
作者:Joydev K. Laha、Ummehani Tinwala、Mandeep Kaur Hunjan
DOI:10.1039/d1nj05068k
日期:——
objective of this work was to develop persulfate mediated oxidative transformations that can be performed nearly at room temperature using water as a solvent. This report describes modified Minisci aroylation of isoquinolines with arylglyoxylic acids using choline persulfate and its pre-composition (choline acetate and K2S2O8) in water at 40 °C. A few other nitrogen heterocycles were also utilized affording
金属过硫酸盐介导的热氧化有机转化总是需要更高的温度并且经常使用有机溶剂。这项工作的目的是开发过硫酸盐介导的氧化转化,它可以在几乎室温下使用水作为溶剂进行。本报告描述了使用过硫酸胆碱及其预组合物(醋酸胆碱和 K 2 S 2 O 8) 在 40 °C 的水中。还使用了一些其他氮杂环,以良好到极好的产率提供各种芳酰化产物。与可能产生金属盐副产物的金属过硫酸盐不同,本文报道的化学的一个关键特征包括使用含有可生物降解胆碱的环境无害的过硫酸胆碱作为抗衡阳离子,Minisci 反应在 40 °C 下作为唯一的溶剂证明,和过硫酸盐的非常规活化。
Room Temperature Metal-Catalyzed Oxidative Acylation of Electron-Deficient Heteroarenes with Alkynes, Its Mechanism, and Application Studies
作者:Shweta Sharma、Mukesh Kumar、Ram A. Vishwakarma、Mahendra K. Verma、Parvinder Pal Singh
DOI:10.1021/acs.joc.8b01475
日期:2018.10.19
room-temperature, regioselective Minisci reaction for the acylation of electron-deficient heteroarenes with alkynes. The method has broad functional group compatibility and gives exclusively monoacylated products in good to excellent yields. The mechanistic pathway was analyzed based on a series of experiments confirming the involvement of a radical pathway. The 18O-labeling experiment suggested that water
Oxidant-Controlled C-sp<sup>2</sup>/sp<sup>3</sup>–H Cross-Dehydrogenative Coupling of N-Heterocycles with Benzylamines
作者:Rohit Sharma、Mohd Abdullaha、Sandip B. Bharate
DOI:10.1021/acs.joc.7b00856
日期:2017.9.15
cross-dehydrogenative coupling (CDC) of benzylamines with N-heterocycles having sp2 or sp3 carbon resulted in the formation of C-benzoylated or alkenylated products. Benzoylation of N-heterocycles occurs via (NH4)2S2O8 catalyzed benzoyl radical formation. An oxidative alkenylation of N-heterocycles having C-sp3 carbon (2-methylaza-arenes) occurs via deamination of benzylamine followed by C-sp3-H bond activation
苄基胺与具有sp 2或sp 3碳的N-杂环的氧化剂控制的离子液体介导的交叉脱氢偶联(CDC)导致C-苯甲酰化或烯基化产物的形成。N-杂环的苯甲酰化是通过(NH 4)2 S 2 O 8催化的苯甲酰基基团形成的。具有C-sp 3碳的N-杂环(2-甲基氮杂芳烃)的氧化烯基化反应是通过苄胺的脱氨基反应,然后以高立体选择性进行C-sp 3 -H键活化而进行的。苯甲酰化和烯基化方案均不含金属,绿色,简单,有效,并且可耐受多种官能团。