Catalytic Hydrogenation of Amides to Amines under Mild Conditions
作者:Mario Stein、Bernhard Breit
DOI:10.1002/anie.201207803
日期:2013.2.18
Under (not so much) pressure: A general method for the hydrogenation of tertiary and secondary amides to amines with excellent selectivity using a bimetallic Pd–Re catalyst has been developed. The reaction proceeds under low pressure and comparatively low temperature. This method provides organic chemists with a simple and reliable tool for the synthesis of amines.
benzylamine, CO2 and methanol. The yield of methyl benzylcarbamate reached 92% at >99% benzylamine conversion and 92% benzylamine-based selectivity even in the absence of the dehydrating agents. The catalyst is reusable after the calcination at 873 K for 3 h. Various carbamates can be synthesized with good yield and high selectivity by the reaction of amines + CO2 + alcohols over CeO2. The main formation
Disclosed are compounds of Formula (I):
or a salt thereof, wherein: Z is CR
6
R
6
or C═O; Ring A is:
and R
1
, R
2
, R
3
, R
4
, R
5
, m, and n are defined herein. Also disclosed are methods of using such compounds to inhibit Helios protein, and pharmaceutical compositions comprising such compounds. These compounds are useful in the treatment of viral infections and proliferative disorders, such as cancer.
One‐pot Reductive Amination of carbonyl Compounds with Nitro Compounds by Transfer Hydrogenation over Co–N
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as catalyst
作者:Peng Zhou、Zehui Zhang
DOI:10.1002/cssc.201700348
日期:2017.5.9
reductive amination of carbonylcompounds with nitro compounds using formic acid as the hydrogen donor over a heterogeneous non‐noble‐metal catalyst (Co‐Nx/C‐800‐AT, generated by the pyrolysis of the cobalt phthalocyanine/silica composite at 800°C under a N2 atmosphere and subsequent etching by HF). Both nitrogen and cobalt were of considerable importance in the transferhydrogenation reactions with formic
通过在非均相非贵金属催化剂(Co-N x / C-800- Co)上使用甲酸作为氢供体,通过羰基化合物与硝基化合物的一锅还原羰基化与硝基化合物的合成,开发了一种新的仲胺合成方法。AT,是在N 2气氛下于800℃下热解钴酞菁/二氧化硅复合物并随后通过HF蚀刻生成的。氮和钴在与甲酸的转移氢化反应中都具有相当重要的意义。
One-pot reductive amination of carbonyl compounds with nitro compounds with CO/H2O as the hydrogen donor over non-noble cobalt catalyst
The one-pot reductiveamination of carbonyl compounds with nitro compounds over heterogeneous non-noble metal catalysts was developed for the first time by transfer hydrogenation with CO/H2O as the hydrogen donor. Nitrogen-doped carbon supportedcobaltnanoparticles were observed to be active toward this reaction, affording structurally-diverse secondary amines with high yields. Kinetic studies revealed
通过以CO / H 2 O为氢供体进行加氢转移,首次开发了在多相非贵金属催化剂上用硝基化合物进行羰基化合物与硝基化合物的一锅还原胺化反应。观察到氮掺杂的碳负载的钴纳米颗粒对该反应具有活性,从而以高收率提供结构多样的仲胺。动力学研究表明,亚胺(C N键)的转移氢化是决定速率的步骤。反应机理的研究表明,氮和钴纳米颗粒用于与CO的转移氢化重要/ H 2 O操作产生质子(N ħ +)和氢化(共ħ -)作为活跃物种。此外,非均相钴催化剂是高度稳定的,并且在再循环实验期间不损失其催化活性。