<i>N</i>
-Arylamines Coupled with Aldehydes, Ketones, and Imines by Means of Photocatalytic Proton-Coupled Electron Transfer
作者:Qing Xia、Hao Tian、Jianyang Dong、Yi Qu、Lili Li、Hongjian Song、Yuxiu Liu、Qingmin Wang
DOI:10.1002/chem.201801886
日期:2018.7.2
A photoredox‐catalyzed umpolung strategy for coupling reactions between aldehydes, ketones, imines, and N‐arylamines is reported. These reactions proceed by a Brønstedacid‐activated proton‐coupled electron transfer pathway, and the protocol was used to synthesize a broad scope of 1,2‐amino alcohols and vicinal diamines, both of which are common motifs in biologically active natural products, pharmaceutically
Palladium-Catalyzed C(sp<sup>2</sup>)–N Bond Cross-Coupling with Triaryl Phosphates
作者:Zicong Chen、Xiangmeng Chen、Chau Ming So
DOI:10.1021/acs.joc.9b00703
日期:2019.5.17
The first general palladium-catalyzed amination of aryl phosphates is described. The combination of MorDalPhos with [Pd(π-cinnamyl)Cl]2 enables the amination of electron-rich, electron-neutral, and electron-poor aryl phosphates with a board range of aromatic, aliphatic, and heterocyclic amines. Common functional groups such as ether, keto, ester, and nitrile show an excellent compatibility in this
Visible‐Light‐Induced Controlled Oxidation of
<i>N</i>
‐Substituted 1,2,3,4‐Tetrahydroisoquinolines for the Synthesis of 3,4‐Dihydroisoquinolin‐1(2
<i>H</i>
)‐ones and Isoquinolin‐1(2
<i>H</i>
)‐ones
作者:Ajay H. Bansode、Gurunath Suryavanshi
DOI:10.1002/adsc.202001266
日期:2021.3.2
controlled oxidation of N‐substituted 1,2,3,4‐tetrahydroisoquinolines is developed for the synthesis of 3,4‐dihydroisoquinolin‐1(2H)‐ones and isoquinolin‐1(2H)‐ones. The present method feature's a broad substrate scope, good functional group tolerances, and the products were prepared in good to excellent yields. The developed methodology further demonstrated in the synthesis of isoindolo[2,1‐b] isoquinolin‐5(7H)‐one
Aerobic α‐Oxidation of N‐Substituted Tetrahydroisoquinolines to Dihydroisoquinolones via Organo‐photocatalysis
作者:Kim Aganda、Boseok Hong、Anna Lee
DOI:10.1002/adsc.201801301
日期:——
An efficient visible‐light‐induced α‐oxidation of N‐substituted tetrahydroisoquinolines to dihydroisoquinolones has been developed using eosinY as an organo‐photocatalyst and oxygen as a green oxidant. The reactions were carried out under mild reaction conditions; the desired dihydroisoquinolones were obtained in up to 96% yield at room temperature under oxygen atmosphere. This transformation provides
Radical alkylation of C(sp<sup>3</sup>)–H bonds with diacyl peroxides under catalyst-free conditions
作者:Hao Tian、Wentao Xu、Yuxiu Liu、Qingmin Wang
DOI:10.1039/c9cc08056b
日期:——
Herein, we describe a protocol for alkylation reactions of C(sp3)–H bonds with diacylperoxides by means of a process involving cross-coupling between an alkyl radical and an α-aminoalkyl radical. The mild, catalyst- and additive-free conditions make this protocol superior to previously reported C(sp3)–H alkylation strategies. The protocol was applied to 1,2,3,4-tetrahydroisoquinolines and a tetrahydro-β-carboline