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。
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.
An unprecedented oxidant-mediated reductive amination of tertiary anilines and aldehydes without external reducing agents was developed via the nucleophilic attack of the oxygen atom of the carbonyl group to in situ generated iminium ions, in which tertiary anilines were used as both nitrogen source and reducing agent for the first time.