Visible-Light-Mediated Aerobic Oxidation of <i>N</i>-Alkylpyridinium Salts under Organic Photocatalysis
作者:Yunhe Jin、Lunyu Ou、Haijun Yang、Hua Fu
DOI:10.1021/jacs.7b07883
日期:2017.10.11
Quinolones and isoquinolones exhibit diverse biological and pharmaceutical activities, and their synthesis is highly desirable under mild conditions. Here, a highly efficient and environmentally friendly visible light-mediated aerobic oxidation of readily available N-alkylpyridinium salts has been developed with Eosin Y as the organic photocatalyst and air as the terminal oxidant, and the reaction
Gold vs Rhodium Catalysis: Tuning Reactivity through Catalyst Control in the C–H Alkynylation of Isoquinolones
作者:Aslam C. Shaikh、Dinesh R. Shinde、Nitin T. Patil
DOI:10.1021/acs.orglett.6b00175
日期:2016.3.4
A site-selective C-4/C-8 alkynylation of isoquinolones catalyzed by gold and rhodium complexes is reported. A broad range of synthetically useful functional groups (−F, −Cl, −Br, −CF3, −OMe, alkyl, etc.) were tolerated, providing an efficient and robust protocol for the synthesis either C-4- or C-8-alkynylated isoquinolones.
with vinylene carbonate for the synthesis of isoquinolinones and pyridinones has been developed. This protocol employing inexpensive Co(III) as the catalyst tolerated diverse functional groups and substitution patterns, affording the target products with good to excellent yields. The synthetic utility of this transformation was demonstrated by a three-step synthesis of gusanlung D, 8-oxopseudopalmatine
BF<sub>3</sub>⋅Et<sub>2</sub>O‐Catalyzed Selective C‐4 Alkylation of Isoquinolin‐1(2<i>H</i>)‐ones Employing <i>p</i>‐Quinone Methides
作者:Devidas A. More、Ganesh S. Ghotekar、M. Muthukrishnan
DOI:10.1002/asia.202300546
日期:2023.9
A practical and efficient synthesis of C-4 alkylated isoquinolin-1(2H)-ones through conjugate addition of isoquinolin-1(2H)-ones to p-quinone methides is reported. The reaction is facilitated by Lewis acid catalysis and provides a wide range of C-4 alkylated isoquinolin-1(2H)-ones at ambient temperature in good to excellent yields.
报道了通过异喹啉-1(2 H )-酮与对醌甲基化物的共轭加成来实用且有效地合成C-4烷基化异喹啉-1(2 H )-酮。该反应由路易斯酸催化促进,并在环境温度下以良好至优异的收率提供多种 C-4 烷基化异喹啉-1(2 H )-酮。