Photoredox-Catalyzed Synthesis of Remote Fluoroalkylated Azaarene Derivatives and the α-Deuterated Analogues via 1,n-Hydrogen-Atom-Transfer-Involving Radical Reactions
provided a series of catalysts based on a pyrazine heterocyclic scaffold with easy synthesis and further modification, diverse photoredox characteristics and wide application potential across modern photoredox transformations. The photoredox catalytic activities of the target catalysts were examined in a benchmark cross-dehydrogenative coupling and novel and challenging annulation reactions.
Here, we report dicyanopyrazine (DPZ)-derived push–pull chromophores, easily prepared and tunable organic compounds, as new kinds of photoredox catalysts.
Catalytic Enantioselective Addition of Prochiral Radicals to Vinylpyridines
作者:Kangning Cao、Siu Min Tan、Richmond Lee、Songwei Yang、Hongshao Jia、Xiaowei Zhao、Baokun Qiao、Zhiyong Jiang
DOI:10.1021/jacs.9b00286
日期:2019.4.3
Pyridine, one of the most important azaarenes, is ubiquitous in functional molecules. The electronic properties of pyridine have been exploited to trigger asymmetric transformations of prochiral species as a direct approach for accessing chiral pyridine derivatives. However, the full potential of this synthetic strategy for the construction of enantioenriched γ-functionalized pyridines remains untapped
[EN] METHOD OF SYNTHESIS OF 5,6‑BIS(5‑ALKOXYTHIOPHEN‑2‑YL)PYRAZINE-2,3-DICARBONITRILES, DERIVATIVES OF DICYANOPYRAZINE AND USE THEREOF<br/>[FR] PROCÉDÉ DE SYNTHÈSE DE 5,6-BIS(5-ALCOXYTHIOPHÈN-2-YL)PYRAZINE-2,3-DICARBONITRILES, DÉRIVÉS DE DICYANOPYRAZINE ET UTILISATION ASSOCIÉE
申请人:UNIV PARDUBICE
公开号:WO2019185068A1
公开(公告)日:2019-10-03
The present invention relates to a method of synthesis of compounds of general formula (I) wherein R is linear or branched (C1-C8) alkyl, (C5-C6) cycloalkyl or benzyl, the method comprising the following steps: 10 step a) Friedel-Crafts reaction of thiophene derivative oxalyldichloride, followed by step b) Lewis acid catalyzed condensation reaction. The present invention further relates to dicyanopyrazine derivatives, and to the use thereof in catalysis of photoredox reactions.
Organocatalytic <i>α</i>‐Aminoalkylation of Azomethine Imines by <i>α</i>‐Silylamines under Blue LED Light
作者:Jiacheng Li、Lorenzo Carli、Sara Helen Kyne、Philip Wai Hong Chan
DOI:10.1002/adsc.202300463
日期:2023.7.18
A synthetic method to prepare 1,2-diamines efficiently that relies on the 4CzPN-catalysed α-aminoalkylation of azomethineimines by secondary and tertiary α-silylamines under blue light emitting diode (LED) light (456 nm) is described. Achieved under metal- and additive-free reaction conditions at room temperature, the synthetic protocol was shown to afford product yields up to 99% and applicable to