Carbon Dioxide as a C<sub>1</sub>Building Block for the Formation of Carboxylic Acids by Formal Catalytic Hydrocarboxylation
作者:Thomas G. Ostapowicz、Marc Schmitz、Monika Krystof、Jürgen Klankermayer、Walter Leitner
DOI:10.1002/anie.201304529
日期:2013.11.11
A happy marriage of two processes: An effective catalytic system was identified for the direct synthesis of carboxylicacids from non‐activated olefins or alcohols, CO2, and H2. Detailed analysis together with labeling studies indicated that the overall hydrocarboxylation of simple olefins results from a combination of the reverse water–gas shift (rWGS) reaction and a hydroxycarbonylation step, each
Alkanes to carboxylic acids in aqueous medium: metal-free and metal-promoted highly efficient and mild conversions
作者:Marina V. Kirillova、Alexander M. Kirillov、Maxim L. Kuznetsov、José A. L. Silva、João J. R. Fraústo da Silva、Armando J. L. Pombeiro
DOI:10.1039/b900853e
日期:——
A convenient and clean route to transform, in aqueous medium, various alkanes to carboxylic acidsvia single-pot carboxylation with CO and water, under mild conditions, has been achieved, proceeding efficiently and selectively even without any metal catalyst and any acid additive, at low temperatures; the relevant hydroxylating role of H2O and radical mechanisms are disclosed by radical-trap, H218O and DFT studies.
carboxylic acids from CO2 and H2 is a novel and very attractive topic. Herein we present a protocol of synthesizing C3+ carboxylic acids via the reaction of alcohols with CO2 and H2. A catalytic system consisting of iridium(III) acetate and LiI could effectively accelerate this reaction. The reaction could occur at above 120 °C and the best result was obtained at 170 °C. The catalytic system could be
由CO 2和H 2生产高级羧酸是一个新颖且非常有吸引力的课题。在此,我们提出了通过醇与 CO 2和 H 2的反应合成 C 3+羧酸的方案。由乙酸铱( III )和LiI组成的催化体系可以有效地加速该反应。反应可在120℃以上发生,170℃时效果最好。该催化体系可应用于各种醇(伯、仲和叔醇和多元醇)。在系统控制实验的基础上提出了反应机理。