Expanding the Catalytic Scope of (Cyclopentadienone)iron Complexes to the Hydrogenation of Activated Esters to Alcohols
作者:Piotr Gajewski、Angela Gonzalez-de-Castro、Marc Renom-Carrasco、Umberto Piarulli、Cesare Gennari、Johannes G. de Vries、Laurent Lefort、Luca Pignataro
DOI:10.1002/cctc.201600972
日期:2016.11.22
Herein, we report the application of easy‐to‐make and bench‐stable (cyclopentadienone)iron complexes (such as 1) as precatalysts for the hydrogenation of esters. After optimization of the reaction conditions (i.e., solvent, temperature, pressure), complex 1 was tested in the hydrogenation of a range of esters. With most of the activated trifluoroacetate esters, quantitative formation of 2,2,2‐trifluoroethanol
本文中,我们报告了易于制备和稳定的(环戊二烯酮)铁配合物(例如1)作为酯加氢的前催化剂的应用。优化反应条件(即溶剂,温度,压力)后,在一系列酯的氢化反应中测试了配合物1。对于大多数活化的三氟乙酸酯,在低催化剂负载下即可定量形成2,2,2-三氟乙醇。对于未活化的酯,未观察到反应。已证明三氟乙酸是水解不稳定的三氟乙酸酯中的常见杂质,它对催化剂起毒害作用。但是,Et 3的简单添加N使催化剂活性得以恢复。我们的研究构成了基于非钳位配体的Fe络合物进行酯加氢的第一个实例。