Synergistic Catalysis: Pd(II) Catalyzed Oxidation of 1,4-Dihydroquinones in the Pd(II) Catalyzed 1,4-Oxidation of Cyclic 1,3-Dienes
作者:Bin Zheng、Michael A. Schmidt、Martin D. Eastgate
DOI:10.1021/acs.joc.5b02769
日期:2016.4.15
Palladium(II) carboxylate salts have been shown to catalyze the oxidation of various hydroquinones to benzoquinones in the presence of t-BuOOH. This new catalytic system has been integrated into the oxidative 1,4-functionalization of cyclic 1,3-dienes where the palladium plays a remarkable dual role, catalyzing both the diene oxidation itself and the regeneration of the active quinone oxidant, which
已显示在叔丁醇存在下,羧酸钯(II)盐催化各种氢醌氧化为苯醌。这种新的催化系统已集成到环状1,3-二烯的氧化1,4-官能化中,钯在其中起着重要的双重作用,既催化二烯氧化本身,又催化活性醌氧化剂的再生。二烯功能化。这些新条件提供了比现有技术显着提高的反应速率,并允许显着降低完全转化所需的亲核羧酸盐的当量。