Unprecedented Iron-Catalyzed Ester Hydrogenation. Mild, Selective, and Efficient Hydrogenation of Trifluoroacetic Esters to Alcohols Catalyzed by an Iron Pincer Complex
作者:Thomas Zell、Yehoshoa Ben-David、David Milstein
DOI:10.1002/anie.201311221
日期:2014.4.25
synthetically important, environmentally benign hydrogenation of esters to alcohols has been accomplished in recent years only with precious‐metal‐based catalysts. Here we present the first iron‐catalyzedhydrogenation of esters to the corresponding alcohols, proceeding selectively and efficiently in the presence of an ironpincer catalyst under remarkably mild conditions.
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)ironcomplexes (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
Synthesis of benzylpalladium complexes through C–O bond cleavage of benzylic carboxylates: Development of a novel palladium-catalyzed benzylation of olefins
作者:Hirohisa Narahashi、Isao Shimizu、Akio Yamamoto
DOI:10.1016/j.jorganchem.2007.10.051
日期:2008.1
tertiary phosphines to give benzylpalladium(II) carboxylate complexes with cleavage of the benzyl-oxygen bond. The benzylpalladium complexes having the trifluoroacetato ligand react with olefins such as ethyl acrylate to give olefin benzylation products. On the basis of these studies a novel palladium-catalyzed benzylation of olefins was developed without using organic halides as the starting materials