已开发出两种邻位邻苯二甲环的芳香族碳氢键的氧合方案。逆电子需量狄尔斯-阿尔德(IEDDA)反应将酞嗪环转环为萘部分,导致合成了萘[2,1- c ]苯二甲基,1-(邻-羟基芳基)萘和6,7-二氢苯并[ b ]萘并[1,2- d ]奥沙平。这种基于在C–H功能化化学中利用可转化氮杂环的新策略可能潜在地适用于广泛范围的联芳基化合物的合成。
Direct C−H Arylation of Electron-Deficient Heterocycles with Arylboronic Acids
作者:Ian B. Seiple、Shun Su、Rodrigo A. Rodriguez、Ryan Gianatassio、Yuta Fujiwara、Adam L. Sobel、Phil S. Baran
DOI:10.1021/ja1066459
日期:2010.9.29
A directarylation of a variety of electron-deficientheterocycles with arylboronic acids has been developed. This new reaction proceeds readily at room temperature using inexpensive reagents: catalytic silver(I) nitrate in the presence of persulfate co-oxidant. The scope with respect to heterocycle and boronic acid coupling partner is broad, and sensitive functional groups are tolerated. This method
Mechanically induced transition metal free C(sp)-H arylation of quinoxalin(on)es with diaryliodonium salts and piezoelectric BaTiO3
作者:Jun Jiang、Shengjie Song、JingJing Guo、Jiadi Zhou、Jianjun Li
DOI:10.1016/j.tetlet.2022.153820
日期:2022.5
A transition metalfree mechanically induced C(sp2)-H arylation of quinoxalin(on)es is described. In this study, diaryliodoniumsalts generate aryl radical by planetary ball milling, with the assist of piezoelectric material BaTiO3. A broad range of functional groups are tolerated to give products in moderate to good yields via radical mechanism.
Electrochemical Oxidative C–H Arylation of Quinoxalin(on)es with Arylhydrazine Hydrochlorides under Mild Conditions
作者:Shengjie Song、Xiangjun Shi、Yunsheng Zhu、Quanlei Ren、Peng Zhou、Jiadi Zhou、Jianjun Li
DOI:10.1021/acs.joc.2c00043
日期:2022.4.1
C–H functionalization directed by transformable nitrogen heterocycles: synthesis of ortho-oxygenated arylnaphthalenes from arylphthalazines
作者:Shiva K. Rastogi、Derek C. Medellin、Alexander Kornienko
DOI:10.1039/c3ob42255k
日期:——
Two protocols for oxygenation of aromatic C–H bonds ortho-positioned to the phthalazine ring were developed. The transannulation of the phthalazine ring to a naphthalene moiety by an Inverse Electron Demand Diels–Alder (IEDDA) reaction led to the synthesis of naphtho[2,1-c]chromenes, 1-(ortho-hydroxyaryl)naphthalenes and 6,7-dihydrobenzo[b]naphtho[1,2-d]oxepine. This new strategy based on the utilization
已开发出两种邻位邻苯二甲环的芳香族碳氢键的氧合方案。逆电子需量狄尔斯-阿尔德(IEDDA)反应将酞嗪环转环为萘部分,导致合成了萘[2,1- c ]苯二甲基,1-(邻-羟基芳基)萘和6,7-二氢苯并[ b ]萘并[1,2- d ]奥沙平。这种基于在C–H功能化化学中利用可转化氮杂环的新策略可能潜在地适用于广泛范围的联芳基化合物的合成。
Light‐Driven Catalyst‐Free Access to Phthalazines: Entry to Antiviral Model Drugs by Merging Domino Reactions**
Light as air: A straightforward metal-free four-step one-pot synthetic strategy to access new high-value functionalized phthalazines was developed. Combining a facile light-mediated enolization of o-methyl benzophenones/Diels-Alder reaction domino process with a subsequent deprotection/aromatization domino reaction leads to waste-reducing and cost-effective synthesis of new antiviral model drugs.