Auto-oxidation promoted sp<sup>3</sup> C–H arylation of glycine derivatives
作者:Yuanyuan Wei、Jie Wang、Yajun Wang、Xiaoqiang Yao、Caixia Yang、Congde Huo
DOI:10.1039/c8ob01068d
日期:——
An auto-oxidation promoted sp3 C–H arylation reaction between N-aryl glycine derivatives and electron-rich arenes, leading to the formation of N-aryl α-aryl α-amino acid derivatives, is described. This atom-economical and environmentally benign reaction proceeds smoothly under mild reaction conditions and requires only Brønstedacid and oxygen (balloon). A plausible radical involved mechanism is proposed
A novel and efficient stable radical cation triarylaminiumsalt‐catalyzed aerobic double Friedel–Crafts alkylation reaction of glycine derivatives with indoles has been developed. The reaction was performed in the absence of any other additives under mild conditions and only requires an air atmosphere (or oxygen, 1 atm) as co‐oxidant.
Copper‐Catalyzed Double Friedel‐Crafts Alkylation of Tetrahydroquinolines Under Aqueous Conditions: Efficient Synthesis of gem‐Diarylacetic Esters
作者:Daggupati V. Ramana、Karu Sudheer Kumar、Ealeswarapu Srujana、Malapaka Chandrasekharam
DOI:10.1002/ejoc.201801369
日期:2019.1.31
2,2‐Bis(1,2,3,4‐tetrahydroquinolin‐6‐yl)acetates can be synthesized by using an efficient Cu‐catalyzed double Friedel‐Craftsalkylation strategy under aqueous conditions starting from N‐arylglycine esters and tetrahydroquinolines as nucleophiles. N‐methyl aniline and indoles were also applied as nucleophiles.
Visible-light promoted α-alkylation of glycine derivatives with alkyl boronic acids
作者:Jiayuan Wang、Yingpeng Su、Zhengjun Quan、Jun Li、Jie Yang、Yong Yuan、Congde Huo
DOI:10.1039/d0cc07688k
日期:——
A visible-light-mediated aerobic α-alkylation reaction of glycine derivatives with alkyl boronicacids has been established in the presence of a Ru/Cu catalyst system, giving the desired radical coupling products efficiently. The transformation features mild reaction conditions and broad substrate scope, delivering a wide range of complex unnatural α-amino-acid derivatives.
Photocatalyzed Reverse Polarity Oxidative Povarov Reaction of Glycine Derivatives with Maleimides
作者:Yongxin Zhang、Wei Jiang、Xiazhen Bao、Yifeng Qiu、Yong Yuan、Caixia Yang、Congde Huo
DOI:10.1002/cjoc.202100401
日期:2021.12
An oxidative tandem (4+2)-cyclization/aromatization of N-aryl glycine derivatives with electron-deficient alkenes was first achieved using Ru(bpy)3Cl2 as a photocatalyst and TBHP as an oxidant in combination with visible-light irradiation by blue LEDs. One-electron oxidation and the following α-deprotonation of glycine derivatives afford α-amino alkyl radicals, which were then trapped by electrophilic