An Efficient Solvent-Free Microwave-Assisted Synthesis of Cinnamamides by Amidation Reaction Using Phenylboronic Acid/Lewis Base Co-catalytic System
作者:Khadidja Khaldoun、Abdelmounaim Safer、Salima Saidi-Besbes、Bertrand Carboni、Rémy Le Guével、François Carreaux
DOI:10.1055/s-0039-1690132
日期:2019.10
amines, such as substituted anilines, are also efficientunder these conditions. A series of novel conjugated amides have been evaluated for their cytotoxic activities against several human cancer cell lines. A microwave-assisted dehydrative amide condensation reaction is reported as an efficient access to cinnamamide derivatives under solvent-free conditions. This protocol between conjugated carboxylic
Manganese(I) Catalyzed α-Alkenylation of Amides Using Alcohols with Liberation of Hydrogen and Water
作者:Biplab Keshari Pandia、Chidambaram Gunanathan
DOI:10.1021/acs.joc.1c00685
日期:2021.8.6
Herein, unprecedented manganese-catalyzed direct α-alkenylation of amides using alcohols is reported. Aryl amides are reacted with diverse primary alcohols, which provided the α,β-unsaturated amides in moderate to good yields with excellent selectivity. Mechanistic studies indicate that Mn(I) catalyst oxidizes the alcohols to their corresponding aldehydes and also plays an important role in efficient
The first intermolecular Michael addition of benzene leading to the formation of 3,3-diphenylpropionanilide is described. 2-Methoxyaniline was reacted with cinnamoyl chloride to give 2-methoxycinnamanilide (1) which was treated with aluminum chloride in benzene at 80°C to afford 2′-hydroxy-3,3-diphenylpropionanilide (4) in an 85% overall yield. Accordingly, 4′-hydroxy-2′-methyl-3,3-diphenylpropionanilide
Palladium-Imidazolium<i>N</i>-Heterocyclic Carbene-Catalyzed Carbonylative Amidation With Boronic Acids, Aryl Diazonium Ions, and Ammonia
作者:Merritt B. Andrus、Yudao Ma、Chun Song、Qiang Chai、Changqin Ma
DOI:10.1055/s-2003-42478
日期:——
tetrafluoroborates have been coupled with arylboron compounds, carbon monoxide, and ammonia to give aryl amides in high yields. A saturated N-heterocyclic carbene (NHC) ligand, H 2 IPr was used with palladium(II) acetate to give the active catalyst. A mechanism is proposed for this novel four-component couplingreaction.
芳基重氮四氟硼酸盐已与芳基硼化合物、一氧化碳和氨偶联,以高收率得到芳基酰胺。将饱和的 N-杂环卡宾 (NHC) 配体 H 2 IPr 与乙酸钯 (II) 一起使用以得到活性催化剂。为这种新颖的四组分偶联反应提出了一种机制。
Copper-catalyzed α-selective C–H trifluoromethylation of acrylamides with TMSCF3
作者:Shang-Zheng Sun、Hui Xu、Hui-Xiong Dai
DOI:10.1016/j.cclet.2019.02.011
日期:2019.5
Abstract A copper-catalyzed α-selective C–H trifluoromethylation of acrylamides with TMSCF3 is described. A wide range of arenes and heteroarenes at the β-position of acrylamides are compatible with the reaction, affording the corresponding (E)-trifluoromethylated products in moderate to good yields. The reaction proceeded fast and can be completed within 30 min.