A Practical Method for Preparation of 4-Hydroxyquinolinone Esters
作者:Gregory L. Beutner、Jeffrey T. Kuethe、Nobuyoshi Yasuda
DOI:10.1021/jo071200x
日期:2007.8.31
4-Hydroxyquinolinone esters are a common motif for many medicinal agents. Several methods exist for preparation of these compounds, generally involving the use of sodium hydride, which raises significant safety issues and limits their application to large-scale synthesis. In this note a practical, safe, and general method that employs a combination of diisopropylethylamine and sodium tert-butoxide
Palladium-Catalyzed Regioselective Carbonylation of C–H Bonds of <i>N</i>-Alkyl Anilines for Synthesis of Isatoic Anhydrides
作者:Zheng-Hui Guan、Ming Chen、Zhi-Hui Ren
DOI:10.1021/ja308976x
日期:2012.10.24
carbonylation of N-alkyl anilines for the synthesis of isatoic anhydrides has been developed. The key Pd-catalyst intermediate has been isolated and characterized. This novel Pd-catalyzed carbonylation reaction tolerates a wide range of functional groups and is a reliable method for the rapid elaboration of readily available N-alkyl anilines into a variety of substituted isatoic anhydrides under mild conditions
Synthesis and Antimicrobial Activity of Novel 4-Hydroxy-2-quinolone Analogs
作者:Thitiphong Khamkhenshorngphanuch、Kittipat Kulkraisri、Alongkorn Janjamratsaeng、Napasawan Plabutong、Arsa Thammahong、Kanitta Manadee、Sarisa Na Pombejra、Tanatorn Khotavivattana
DOI:10.3390/molecules25133059
日期:——
of substituent, has a dramatic impact on the antimicrobialactivities. Particularly, the brominated analogs 3j with a nonyl side chain exhibited exceptional antifungal activities against A. flavus (half maximal inhibitory concentration (IC50) = 1.05 µg/mL), which surpassed that of the amphotericin B used as a positive control. The antibacterial activity against S. aureus, although not as potent, showed