酰胺加氢成胺是重要的反应,但是需要高温和H 2压力是一个问题。在温和的反应条件下(低于30 bar H 2和70°C)有效的催化剂尚未见报道。在此,通过使用Pt-V双金属催化剂首次实现了酰胺的温和氢化。酰胺氢化,在70°C下1 bar H 2或5 bar H 2下使用双金属催化剂达到室温。温和的反应条件能够在抑制芳烃氢化的同时,将各种酰胺高度选择性地氢化为相应的胺。催化剂表征表明,双金属催化剂催化活性的起源是亲氧性的V-修饰的Pt纳米颗粒,其直径为2 nm。
Phosphovanadomolybdic acid catalyzed desulfurization–oxygenation of secondary and tertiary thioamides into amides using molecular oxygen as the terminal oxidant
[EN] THERMALLY STABLE VOLATILE FILM PRECURSORS<br/>[FR] PRÉCURSEURS DE FILM MINCE VOLATILS ET THERMIQUEMENT STABLES
申请人:UNIV WAYNE STATE
公开号:WO2010132871A1
公开(公告)日:2010-11-18
A precursor for the deposition of a thin film by atomic layer deposition is provided. The compound has the formula MxLy where M is a metal and L is an amidrazone-derived ligand or an amidate-derived ligand. A process of forming a thin film using the precursors is also provided.
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.
Niobium Pentachloride Promoted Conversion of Carboxylic Acids to Carboxamides: Synthesis of the 4-Aryl-1,2,3,4-tetrahydroisoquinoline Alkaloid Structures
作者:Claudio C. Lopes、Rosangela S. Lopes、Marcelo S. Nery、Renata P. Ribeiro
DOI:10.1055/s-2003-36823
日期:——
A practical method for the conversion of carboxylic acids to the corresponding carboxamides mediated by niobium pentachloride under mild conditions is described. The synthesis of the 4-aryl-1,2,3,4-tetrahydroisoquinoline alkaloid structures was accomplished via benzylic lithiation of N-methyl-3,4-dimethoxy-2-(4'-methoxybenzyl)benzamide.
Acceleration of Pd-Catalyzed Amide N-Arylations Using Cocatalytic Metal Triflates: Substrate Scope and Mechanistic Study
作者:Joseph Becica、Graham E. Dobereiner
DOI:10.1021/acscatal.7b01317
日期:2017.9.1
comparison with iodobenzene (PhI). The observation of an aryl halide dependence on rate and various qualitative kinetic experiments are consistent with a mechanism in which ligand exchange of halide for amide (“transmetalation”) is turnover limiting. The mechanism may be different depending on whether PhBr or PhI is used as a coupling partner. Oxidative addition complexes (xantphos)Pd(Ph)(X) (X = Br, I;
PROCESS FOR STRAIGHTENING KERATIN FIBRES WITH A HEATING MEANS AND DENATURING AGENTS
申请人:Philippe Michel
公开号:US20100028280A1
公开(公告)日:2010-02-04
The invention relates to a process for straightening keratin fibres, comprising: (i) a step in which a straightening composition containing at least two denaturing agents is applied to the keratin fibres, (ii) a step in which the temperature of the keratin fibres is raised, using a heating means, to a temperature of between 110 and 250° C.