USE OF COMPOSITIONS OBTAINED BY CALCINING PARTICULAR METAL-ACCUMULATING PLANTS FOR IMPLEMENTING CATALYTICAL REACTIONS
申请人:CENTRE NATIONAL DE LA RECHERCHE SCIENTIFIQUE
公开号:US20150376224A1
公开(公告)日:2015-12-31
The use of metal-accumulating plants for implementing chemical reactions especially catalytical reactions.
金属积累植物用于实现化学反应,特别是催化反应的使用。
Flow synthesis of secondary amines over Ag/Al<sub>2</sub>O<sub>3</sub> catalyst by one-pot reductive amination of aldehydes with nitroarenes
作者:Ekaterina A. Artiukha、Alexey L. Nuzhdin、Galina A. Bukhtiyarova、Valerii I. Bukhtiyarov
DOI:10.1039/c7ra08986d
日期:——
An alumina-supported silver catalyst was investigated in the one-pot reductiveamination of aldehydes with nitroarenes in a continuous flow reactor using molecular hydrogen as a reducing agent. A series of secondary amines containing alkyl, OH, OCH3, Cl, Br and CC groups was synthesized in good to excellent yields. The yield of the secondary amine depends on the rate of formation of an intermediate
One-pot reductive amination of aldehydes with nitroarenes over an Au/Al<sub>2</sub>O<sub>3</sub> catalyst in a continuous flow reactor
作者:E. A. Artiukha、A. L. Nuzhdin、G. A. Bukhtiyarova、S. Yu. Zaytsev、P. E. Plyusnin、Yu. V. Shubin、V. I. Bukhtiyarov
DOI:10.1039/c5cy00964b
日期:——
Various secondary aromatic amines were synthesized by Au/Al2O3-catalyzed one-pot reductive amination of aldehydes with nitroarenes in a flow reactor.
通过流反应器中金/氧化铝催化的醛与硝基芳烃的一锅还原胺化反应,合成了各种二级芳香胺。
B(C<sub>6</sub>F<sub>5</sub>)<sub>3</sub>-catalyzed tandem protonation/deuteration and reduction of <i>in situ</i>-formed enamines
作者:Rongpei Wu、Ke Gao
DOI:10.1039/d1ob00316j
日期:——
protonation/deuteration and reduction of in situ-formed enamines in the presence of water and pinacolborane was developed. Regioselective β-deuteration of tertiary amines was achieved with high chemo- and regioselectivity. D2O was used as a readily available and cheap source of deuterium. Mechanisticstudies indicated that B(C6F5)3 could activate water to promote the protonation and reduction of enamines.
开发了一种高效的B(C 6 F 5)3催化串联质子化/氘代和在水和频哪醇硼烷存在下还原原位形成的烯胺的方法。叔胺的区域选择性β-氘化具有高的化学和区域选择性。D 2 O被用作一种容易获得且廉价的氘源。机理研究表明,B(C 6 F 5)3可以活化水以促进烯胺的质子化和还原。
Ru‐Catalyzed Deoxygenative Transfer Hydrogenation of Amides to Amines with Formic Acid/Triethylamine
ruthenium(II)‐catalyzed deoxygenative transfer hydrogenation of amides to amines using HCO2H/NEt3 as the reducing agent is reported for the first time. The catalyst system consisting of [Ru(2‐methylallyl)2(COD)], 1,1,1‐tris(diphenylphosphinomethyl) ethane (triphos) and Bis(trifluoromethane sulfonimide) (HNTf2) performed well for deoxygenative reduction of various secondary and tertiary amides into the corresponding
首次报道了使用HCO 2 H / NEt 3作为还原剂的钌(II)催化的酰胺脱氧转移胺成胺。催化剂体系由[Ru(2-甲基烯丙基)2(COD)],1,1,1-三(二苯基膦甲基)乙烷(triphos)和双(三氟甲烷磺酰亚胺)(HNTf 2)在将各种仲酰胺和叔酰胺脱氧还原成相应的胺方面表现出色,选择性极好,并且对包括还原敏感基团在内的官能团表现出很高的耐受性。氢源和酸助催化剂的选择对于催化至关重要。机理研究表明,通过借入氢对原位生成的醇和胺进行还原胺化是主要途径。