Preparation of arylpropiolate esters from trichlorocyclopropenium cation and elaboration of the esters to unsymmetrical 1,4-pentadiyn-3-ones and unsymmetrical tellurapyranones
Direct Synthesis of 4-Quinolones via Copper-Catalyzed Anilines and Alkynes
作者:Xuefeng Xu、Xu Zhang
DOI:10.1021/acs.orglett.7b02495
日期:2017.9.15
and direct approach for constructing 4-quinolones from simple and readily available anilines and alkynes is described. Under the optimal conditions, both N-alkyl- and N-aryl-substituted anilines can be successfully transformed into the corresponding 4-quinolones. This reaction is characterized by mild reaction conditions, high functional-group tolerance, and amenability to gram-scale synthesis.
A highly regioselective hydroamination of unsymmetricalelectron-poor and electron-richalkynes with anilinescatalyzed by Au(I) under mild conditions is reported. In addition, applications toward indole syntheses are presented including an example of a one-pot synthesis from a nonfunctionalized aniline.
products with good enantioselectivity (ee = 73–90%) using a cinchona-based phase-transfercatalyst. α-Branched β-ynone esters possess a highly acidic α-proton and form their corresponding enolate as a single isomer, which allows the enantioselective fluorination reaction to occur under standard cinchona-based phase-transfercatalyst conditions. Moreover, the obtained α-fluorinated product can be treated
The present invention relates to metal complexes and to electronic devices, in particular organic electroluminescent devices, comprising these metal complexes.
本发明涉及金属配合物以及包括这些金属配合物的电子设备,特别是有机电致发光器件。
Carboxylic Acid Salts as Dual‐Function Reagents for Carboxylation and Carbon Isotope Labeling
作者:Shuo Wang、Igor Larrosa、Hideki Yorimitsu、Gregory J. P. Perry
DOI:10.1002/anie.202218371
日期:2023.3.27
The potassium salt of triphenylacetic acid is developed as a combined source of CO2 and base/metalating agent. This method avoids specialized equipment and is used in the carboxylation of a range of compound classes. This provides a mechanistically distinct approach to carboxylation that has also been applied in carbon isotopelabeling.
三苯乙酸的钾盐被开发为 CO 2和碱/金属化剂的组合来源。该方法无需专用设备,可用于一系列化合物类别的羧化。这提供了一种机械上不同的羧化方法,该方法也已应用于碳同位素标记。