A synergistic LUMO lowering strategy using Lewis acid catalysis in water to enable photoredox catalytic, functionalizing C–C cross-coupling of styrenes
作者:Elisabeth Speckmeier、Patrick J. W. Fuchs、Kirsten Zeitler
DOI:10.1039/c8sc02106f
日期:——
available α-carbonyl acetates serve as convenient alkyl radical source for an efficient, photocatalytic cross-coupling with a great variety of styrenes. Activation of electronically different α-acetylated acetophenone derivatives could be effected via LUMO lowering catalysis using a superior, synergistic combination of water and (water-compatible) Lewis acids. Deliberate application of fac-Ir(ppy)3 as photocatalyst
Preparation of aromatic γ-hydroxyketones by means of Heck coupling of aryl halides and 2,3-dihydrofuran, catalyzed by a palladium(<scp>ii</scp>) glycine complex under microwave irradiation
作者:Juan C. Jiménez-Cruz、Ramón Guzmán-Mejía、Eusebio Juaristi、Omar Sánchez-Antonio、Marco A. García-Revilla、J. Betzabe González-Campos、Judit Aviña-Verduzco
DOI:10.1039/d0nj02630a
日期:——
A series of aromatic γ-hydroxyketones were prepared by means of Heck coupling reaction of aryl halides and 2,3-dihydrofuran, catalyzed by PdCl2·Gly2 and under microwave irradiation. This synthetic transformation involves the formation of an aryl-dihydrofuranoic intermediate, followed by an unusual opening of the heterocycle promoted by a water molecule and the formation of the ketone carbonyl function