A straightforward two-step synthesis of benzoxepinones was developed via base-free phosphane-catalyzed Wittig reaction. 3-Methyl-1-phenyl-2-phospholene 1-oxide was used as a precatalyst and trimethoxysilane as a reducing agent. Additionally benzoic acid is employed as a catalyst to facilitate the reduction of the phosphane oxide. Mechanistic investigation revealed the formation of a coumarin as a side
通过无碱膦催化的Wittig反应开发了一种简单的两步合成苯并
庚二酮的方法。使用3-甲基-1-苯基-2-膦-1-氧化物作为前催化剂,使用
三甲氧基硅烷作为还原剂。另外,
苯甲酸被用作催化剂以促进氧化膦的还原。机理研究表明,
香豆素是副产物的形成,这是通过2D NMR实验确定的。报道了对所制备的苯并
庚二酮的代谢活性测试的初步结果。