Trinuclear Non-Heme Iron Complexes Based on 4-Substituted 2,6-Diacylpyridine Ligands as Catalysts in Aerobic Allylic Oxidations
作者:Volker Rabe、Wolfgang Frey、Angelika Baro、Sabine Laschat
DOI:10.1002/hlca.201100195
日期:2012.2
derivative, ligands 4 reacted with Fe(ClO4)3 to form trinuclear Fe3(μ3‐O) complexes 3, which were tested in the aerobic Gif‐type oxidation of α‐pinene to myrtenol, verbenone, myrtenal, and pinene oxide. The electronic nature of the substituents was found to slightly effect the ratio of allylic oxidation/epoxidation, whereas its influence on the oxidation preference of secondary to primary CH bonds is negligible
考虑到好氧氧化中带有吡啶核的铁络合物前体的区域选择性和化学选择性,我们设想了通过在吡啶部分的4位引入不同的取代基,对催化性能产生更有效的影响。描述了这些新型的4-取代的(吡啶-2-6-二基)二丙酸4的合成。类似于未取代的衍生物,配体4以Fe(CLO反应4)3,以形成三核的Fe 3(μ 3 -O)络合物3,将其在好氧测试的Gif的型氧化αpine烯到肉豆蔻醇,马鞭草酮,肉豆蔻醛和氧化烯。取代基的电子性质被发现略微实现烯丙基氧化/环氧化的比例,而其上的次级氧化优选初级ç影响 H键相比,未取代的配合物是微不足道的。