Mild, visible light-mediated decarboxylation of aryl carboxylic acids to access aryl radicals
作者:L. Candish、M. Freitag、T. Gensch、F. Glorius
DOI:10.1039/c6sc05533h
日期:——
Herein we present the first example of aryl radical formation via the visible light-mediated decarboxylation of aryl carboxylic acids using photoredox catalysis.
在本文中,我们介绍了使用光氧化还原催化作用通过可见光介导的芳基羧酸脱羧形成芳基的第一个例子。
A Pd(II)-Catalyzed Ring-Expansion Reaction of Cyclic 2-Azidoalcohol Derivatives: Synthesis of Azaheterocycles
作者:Shunsuke Chiba、Yan-Jun Xu、Yi-Feng Wang
DOI:10.1021/ja9049564
日期:2009.9.16
A Pd(II)-catalyzed ring expansion-reaction of cyclic 2-azidoalcohol derivatives was found to proceed via an unprecedented C-C bond cleavage-C-N bond formation sequence, providing substituted azaheterocycles.
发现 Pd(II) 催化的环状 2-叠氮醇衍生物的扩环反应通过前所未有的 CC 键断裂-CN 键形成序列进行,提供取代的氮杂杂环。
Palladium-N-heterocyclic carbene an efficient catalytic system for the carbonylative cross-coupling of pyridine halides with boronic acids
Carbonylative cross-coupling of different pyridyl halides with various boronic acids was studied using catalytic systems constituted of N-heterocyclic carbene type ligands and palladium. These systems easily obtained in situ from the corresponding imidazolium salt and palladium acetate appear more efficient toward bromopyridines than catalysts based on hindered and basic alkylphosphines such as tricyclohexylphosphine
Synthesis and Utility of Dihydropyridine Boronic Esters
作者:Santanu Panda、Aaron Coffin、Q. Nhu Nguyen、Dean J. Tantillo、Joseph M. Ready
DOI:10.1002/anie.201510027
日期:2016.2.5
When activated by an acylating agent, pyridine boronicesters react with organometallic reagents to form a dihydropyridineboronicester. This intermediate allows access to a number of valuable substituted pyridine, dihydropyridine, and piperidine products.
Silver-Catalyzed Arylation of (Hetero)arenes by Oxidative Decarboxylation of Aromatic Carboxylic Acids
作者:Jian Kan、Shijun Huang、Jin Lin、Min Zhang、Weiping Su
DOI:10.1002/anie.201408630
日期:2015.2.9
arylation of heteroarenes by oxidative decarboxylation of aromatic carboxylic acids. To address this challenge, the silver‐catalyzed intermolecular Minisci reaction of aromatic carboxylic acids was developed. With an inexpensive silver salt as a catalyst, this new reaction enables a variety of aromatic carboxylic acids to undergo decarboxylative coupling with electron‐deficient arenes or heteroarenes regardless