Diphosphines of dppf-Type Incorporating Electron-Withdrawing Furyl Moieties Substantially Improve the Palladium-Catalysed Amination of Allyl Acetates
作者:Aziz Fihri、Jean-Cyrille Hierso、Anthony Vion、Duc Hanh Nguyen、Martine Urrutigoïty、Philippe Kalck、Régine Amardeil、Philippe Meunier
DOI:10.1002/adsc.200505050
日期:2005.7
active Pd/diphosphine catalytic systems incorporating new, air-stable ferrocenyl-furylphosphines allow nucleophilic allylic amination at room temperature with unprecedented turnover frequencies. For instance, in the presence of 0.01 mol % catalyst the coupling of aniline to allyl acetate occurs at a TOF of more than 10,000 h−1; even the addition of the less nucleophile morpholine to allyl acetate is observed
结合了新的,空气稳定的二茂铁基-呋喃基膦的高活性Pd /二膦催化体系可在室温下以前所未有的周转频率进行亲核烯丙基胺化反应。例如,在0.01mol%催化剂的存在下,苯胺与乙酸烯丙酯的偶联在TOF大于10,000h -1时发生;优选地,TOF大于10,000h -1。甚至在TOF为4250 h -1的情况下也观察到向乙酸烯丙酯中添加了较少亲核试剂吗啉。在催化剂负载量较低的情况下,对风味要求很高的空间需求乙酸香叶酯(一种单萜衍生物)的胺化反应证明了该方法的范围,该方法在经济(节省资源和能源)和可持续性方面还具有明显优势。化学(高选择性,无添加剂,低金属含量,因此更易于纯化)。