Photoredox-Catalyzed α-Aminomethyl Carboxylation of Styrenes with Sodium Glycinates: Synthesis of γ-Amino Acids and γ-Lactams
作者:Cong Zhou、Miao Li、Jianwei Sun、Jiang Cheng、Song Sun
DOI:10.1021/acs.orglett.1c00536
日期:2021.4.16
previous reactions with the same type of substrates leading to simple decarboxylation and olefin hydroalkylation, this process involves additional CO2 sequestration, thus leading to olefin α-aminomethyl carboxylation. These findings not only provide new access to α,α-disubstituted γ-amino acids and γ-lactams but also serve as a proof of concept for CO2 reutilization in decarboxylation reactions.
已开发出一种可见光光氧化还原催化的苯乙烯与甘氨酸钠和 CO 2 的还原性α-氨基甲基羧化反应,以高效和区域选择性地合成一系列α,α-二取代 γ-氨基酸和 γ-内酰胺。值得注意的是,从脱羧步骤释放的CO 2可以重新用于随后的羧化。与之前使用相同类型底物导致简单脱羧和烯烃加氢烷基化的反应不同,该过程涉及额外的 CO 2封存,从而导致烯烃 α-氨基甲基羧化。这些发现不仅提供了对α,α-二取代的γ-氨基酸和γ-内酰胺,但也可作为脱羧反应中CO 2 再利用的概念证明。
Access to α-Amino Acid Esters through Palladium-Catalyzed Oxidative Amination of Vinyl Ethers with Hydrogen Peroxide as the Oxidant and Oxygen Source
A novel and convenient palladium catalytic system for the synthesis of α‐amino acid esters from simple starting materials is reported. Hydrogenperoxide not only acts as the green oxidant, but also as the oxygen source. This strategy for the conversion of amines and vinyl ethers into highly functionalized and structurally diverse α‐amino acid esters is characterized by the simplicity of the experimental
Polymer-Supported Ruthenium(II)/Phenyloxazoline Complex: Reusable and Highly Selective Catalyst for N-H Insertion Reactions
作者:Abdel-Moneim Abu-Elfotoh
DOI:10.14233/ajchem.2017.20192
日期:——
A group of functionalized b-amino esters were successfully synthesized in excellent yields (> 99 %) via NH-insertion of ethyldiazoacetate into various amines catalyzed by porous-polymer-supported ruthenium(II)-pheox catalyst. The catalyst was readily recovered and reused at least five times without loss of its catalytic activity.
A new method for generation of non-stabilized α-amino-substituted carbanions by the reaction of magnesium carbenoids with N-lithio arylamines: their reactivity and a new synthesis of α-amino acid derivatives
the α-amino-substituted carbanions with some electrophiles was investigated and it was found that ethyl chloroformate reacted to give α-amino acid derivatives in good yields. As a whole, a new method for one-pot, three-component combined synthesis of α-amino acid derivatives from aryl 1-chloroalkyl sulfoxides was realized.
Iron-catalyzed synthesis of glycine derivatives via carbon–nitrogen bond cleavage using diazoacetate
作者:Yoichiro Kuninobu、Mitsumi Nishi、Kazuhiko Takai
DOI:10.1039/c0cc03781h
日期:——
Treatment of tertiary amines with diazoacetate in the presence of a catalytic amount of an iron salt, FeCl3, in ethanol gave glycine derivatives. In this reaction, a carbonânitrogen single bond of the amine was cleaved.