Readily Accessible Oxazolidine Nitroxyl Radicals: Bifunctional Cocatalysts for Simplified Copper Based Aerobic Oxidation
作者:Christopher J. Gartshore、David W. Lupton
DOI:10.1002/adsc.201000627
日期:2010.12.17
range of bifunctional oxazolidine nitroxyl radicals have been prepared. The application of these co-catalysts to the copper-based aerobic oxidation of alcohols was then investigated. From these studies it was found that the parent tetramethyloxazolidine nitroxyl radical L1 was competent for oxidation in the presence of 2,2′-bipyridine, and the bifunctional pyridyl-containing nitroxyl radicals L2 and
使用两步法,已经制备了一系列双官能的恶唑烷硝基氧基。然后研究了这些助催化剂在铜的需氧氧化过程中的应用。从这些研究中发现,在2,2'-联吡啶存在下,母体四甲基恶唑烷硝酰基自由基L1具有氧化能力,在不存在其他配位配体的情况下,可以使用含双官能吡啶基的硝酰基自由基L2和L3。经过优化后,探索了这种简化转化的范围,证明了一定范围的伯和仲苄醇很容易被氧化。另外,可以实现烯丙基醇和对苯二酚的氧化。