Visible-Light Photoredox-Catalyzed Giese Reaction: Decarboxylative Addition of Amino Acid Derived α-Amino Radicals to Electron-Deficient Olefins
作者:Anthony Millet、Quentin Lefebvre、Magnus Rueping
DOI:10.1002/chem.201602257
日期:2016.9.12
A tin‐ and halide‐free, visible‐light photoredox‐catalyzed Giese reaction was developed. Primary and secondary α‐amino radicals were generated readily from aminoacids in the presence of catalytic amounts of an iridium photocatalyst. The reactivity of the α‐amino radicals has been evaluated for the functionalization of a variety of activated olefins.
Copper-catalyzed aryl amination in aqueous media with 2-dimethylaminoethanol ligand
作者:Zhikuan Lu、Robert J. Twieg
DOI:10.1016/j.tetlet.2005.03.027
日期:2005.4
Copper-catalyzedamination of aryl bromides and iodides under mild conditions has been developed with 2-dimethylaminoethanol as ligand and water as solvent. A variety of hydrophilic and hydrophobic arylhalide substrates have been aminated in good yield with a variety of amino acids, amino alcohols and peptides. This method has successfully N-arylated some hydrophilic amino compounds not available
The synthesis of α-amino acids was carried out in a continuous flow system. In this system, aldimines were efficiently generated in situ via the dehydration–condensation of aldehydes with anilines in a desiccant bed column filled with 4 Å molecular sieves desiccant, followed by reaction with CO2 in an electrochemicalflowmicroreactor to afford the α-amino acids in high to moderate yields. The present
α-氨基酸的合成在连续流动系统中进行。在该系统中,醛亚胺通过醛与苯胺在充满 4 Å 分子筛干燥剂的干燥床柱中脱水缩合而原位高效生成,然后在电化学流动微反应器中与 CO 2反应得到 α-氨基酸在高到中等的产量。本系统可以在不使用化学计量量的金属试剂或剧毒氰化物试剂的情况下提供α-氨基酸。
A Mild and Efficient Method for Copper-Catalyzed Ullmann-Type N-Arylation of Aliphatic Amines and Amino Acids
An efficient and general protocol for copper-catalyzed N-arylation of aliphatic amines and amino acids has been developed using aryliodides under mild conditions (coupling temperature at 25-35 degrees C). For the N-(o-nitrophenyl) amino acid derivatives, subsequent reduction of the nitro group in the presence of tin(II) chloride resulted in 3,4-dihydroquinoxalin-2(1H)-one derivatives in good yields
使用芳基碘化物在温和条件下(偶联温度为 25-35 摄氏度)开发了一种用于铜催化脂肪胺和氨基酸 N-芳基化的高效通用方案。对于 N-(o-硝基苯基) 氨基酸衍生物,随后在氯化锡 (II) 存在下还原硝基会以良好的产率得到 3,4-二氢喹喔啉-2(1H)-one 衍生物。
Dual Palladium/Photoredox-Catalyzed Enantioselective and Regioselective Decarboxylative Hydroaminoalkylation of Allenes
作者:Jun Zheng、Ali Nikbakht、Bernhard Breit
DOI:10.1021/acscatal.1c00153
日期:2021.3.19
atalyzed regio- and enantioselective decarboxylative hydroaminoalkylation of allenes with amino acids is reported. This mild, redox-neutral, and atom-economic process allows access to a range of protected vinyl 1,2-amino ethers in good yields with high levels of branched and enantioselectivity, when alkoxyallenes were employed. Conversely, with alkyl- and aryl-substituted terminalallenes as the substrates