作者:Keshav Raghuvanshi、Karsten Rauch、Lutz Ackermann
DOI:10.1002/chem.201405071
日期:2015.1.19
Intermolecular CH acyloxylations of phenols with removable directing groups were accomplished with a versatile ruthenium catalyst. Specifically, a cationic ruthenium(II) complex, formed in situ, enabled the chemoselective CH oxygenations of a broad range of substrates. The catalyst proved tolerant of synthetically valuable functional groups, and the substrate scope included both (hetero)aromatic
用通用的钌催化剂可实现具有可移动的导向基团的酚的分子间CH酰氧基化反应。具体来说,原位形成的阳离子钌(II)配合物可实现多种底物的化学选择性CH氧合。事实证明该催化剂可耐受合成上有价值的官能团,并且底物范围包括(杂)芳族和更具挑战性的脂族羧酸。拟议的反应机理涉及可逆的CH钌化和氧化诱导的CO键形成的还原消除。