Visible light-mediated oxidative quenching reaction to electron-rich epoxides: highly regioselective synthesis of α-bromo (di)ketones and mechanism study
作者:Lin Guo、Chao Yang、Lewei Zheng、Wujiong Xia
DOI:10.1039/c3ob41245h
日期:——
A novel and simple procedure was developed for the regioselective synthesis of α-bromo (di)ketones from electron-rich epoxides viavisiblelightphotoredoxcatalysis. Through optimization of solvent and light source, the reaction can be rapidly achieved under mild conditions. Moreover, the possible reaction mechanism was proposed and further supported by control experiments.
Rhodium-catalyzed synthesis of 2,3-diaryl-1,4-diketones via oxidative coupling of benzyl ketones using α-thioketone oxidizing reagent
作者:Mieko Arisawa、Guangzhe Li、Masahiko Yamaguchi
DOI:10.1016/j.tetlet.2012.12.107
日期:2013.3
no)benzene (dppBz) catalyzed the oxidativecoupling reaction of aryl benzyl ketones giving 2,3-diaryl-1,4-diketones in high yields. 3,3-Dimethyl-1-methylthio-2-butanone was used as the oxidizing reagent, which was converted to 3,3-dimethyl-2-butanone and dimethyl disulfide. Rhodium enolates were catalytically formed from ketones, which underwent oxidativecoupling using an organosulfur reagent.