The cross-coupling of epoxides with acyl chlorides or anhydrides by a nickel/titanocene dual catalytic system is established. A variety of synthetically useful β-hydroxy ketones were obtained in good to high yields by using modified pyridine-oxazoline ligand. The reaction proceeds via the cooperation of titanocene-catalyzed ring-opening of epoxides and nickel-catalyzed acylation of the benzylic radical
通过
镍/二茂
钛双催化体系建立了
环氧化物与酰
氯或酸酐的交叉偶联。通过使用修饰的
吡啶-
恶唑啉
配体,以良好到高的收率获得了多种合成上有用的β-羟基酮。该反应通过二茂
钛催化的
环氧化物开环和
镍催化的苯
甲基自由基中间体酰化的协同进行。