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。
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.
C–H Activation Relay (CHAR): An Efficient Construction of Isatin Skeleton by Aerobic Oxidation of Glycine Esters
作者:Xiaodong Jia、Yingzu Zhu、Yu Yuan、Xuewen Zhang、Shiwei Lü、Liang Zhang、Liangliang Luo
DOI:10.1021/acscatal.6b01781
日期:2016.9.2
Directed by the strategy of C–H activation relay (CHAR), an efficient construction of isatin skeleton was developed through catalytic oxidation of glycineesters. The mechanistic study reveals that the oxidation of the relatively active C–H bonds initiated the followed activation of remote and inert C–H bonds, and an intramolecular 1,6-hydrogen shift was involved as a key step.
Photoredox-Catalyzed Site-Selective Generation of Carbanions from C(sp<sup>3</sup>)–H Bonds in Amines
作者:Kathiravan Murugesan、Karsten Donabauer、Rok Narobe、Volker Derdau、Armin Bauer、Burkhard König
DOI:10.1021/acscatal.2c00662
日期:2022.4.1
The selective activation of sp3 carbon–hydrogen bonds in the presence of multiple C–H bonds is challenging and remains of supreme importance in chemical research. Late-stage modification of complex molecules via sp3 C–H activation is of high prevalence in organic synthesis. Herein, we describe the activation of a C(sp3)–H bond in the α-position to an amine via a carbanion intermediate. In the presence