An eco-friendly Co(OAc)2-catalyzed aerobic oxidation of 4-benzylphenols into 4-hydroxybenzophenones
作者:Jian-Gang Huang、Ying Guo、Jian-An Jiang、Hong-Wei Liu、Ya-Fei Ji
DOI:10.1007/s11164-014-1801-8
日期:2015.10
An undecorated Co(OAc)2-catalyzed aerobic oxidation system has been reported that enables direct transformation of 4-benzylphenols into the corresponding 4-hydroxybenzophenones. The procedure is especially suitable for electron-withdrawing group-containing substrates, which are commonly inefficient to conduct this category of oxidation. Based on well-defined p-benzoquinone methides and the confirmed ethereal intermediate, a plausible mechanism was depicted.
一种未修饰的Co(OAc)2催化的好氧氧化系统已被报道,它能够将4-苄基苯酚直接转化为相应的4-羟基苯基酮。该方法尤其适用于含有电子吸引基团的底物,因为这类底物通常在进行此类氧化时效率较低。基于明确的对苯醌甲基和确认的醚中间体,提出了一种合理的机制。