Es wurden die N-substituierten 4-[(2-Amino-ethylmercapto)-methyl]-imidazole 2 und 3 dargestellt und auf histaminartige Wirkung untersucht。Die Thioharnstoff- 和 Cyanoguanidin-Derivate von 3b zeigten keine H2-antihistaminische Wirksamkeit。
Matrix-IR Spectroscopic Investigations of the Thermolysis and Photolysis of Diazoamides
作者:Curt Wentrup、Hervé Bibas、Arvid Kuhn、Ullrich Mitschke、Mark C. McMills
DOI:10.1021/jo401695x
日期:2013.11.1
Matrix photolysis of N,N-dialkyldiazoacetamides 1a–d at 7–10 K results in either the formation of C–H insertion products (in case of N,N-dimethyl and N,N-diethyl diazoamides) or almost exclusive Wolff rearrangement to ketenes (in the case of the cyclic diazoamides N-(diazoacetyl)azetidine and N-(diazoacetyl)pyrrolidine). This can be ascribed to higher activation barriers for the approach of the singlet
Application of alkoxide in catalytic transfer hydrogenation of unsaturated nitrogen compounds
作者:Xinzhi Chen、Shaodong Zhou、Yuehan Chen、Zehan Dong、Yeyu Gao、Chao Qian、Chaohong He
DOI:10.1007/s11164-012-0542-9
日期:2012.11
Alcoholate was utilized in catalytic transfer hydrogenation of unsaturated nitrogen compounds. In the reduction of nitrocompounds, oximes and imines, alkoxide was used as the promoter, with alcohol as the hydrogen source, while in the reduction of nitriles, alkoxide was used as the hydrogen source.
Mechanistic insights into the oxidative dehydrogenation of amines to nitriles in continuous flow
作者:Emily C. Corker、Javier Ruiz-Martínez、Anders Riisager、Rasmus Fehrmann
DOI:10.1039/c5cy00577a
日期:——
The oxidative dehydrogenation of various aliphatic amines to their corresponding nitrile compounds using RuO2/Al2O3 catalysts in air was successfully applied to a continuous flow reaction. Conversions of amines (up to >99%) and yields of nitriles (up to 77%) varied depending on reaction conditions and the amine utilised. The presence of water was found to be important for the activity and stability
使用RuO 2 / Al 2 O 3催化剂在空气中将各种脂族胺氧化脱氢成相应的腈化合物已成功应用于连续流动反应。胺的转化率(最高> 99%)和腈的收率(最高77%)取决于反应条件和所用的胺。发现水的存在对于RuO 2 / Al 2 O 3催化剂的活性和稳定性很重要。利用哈米特关系和原位红外光谱揭示了RuO 2 / Al 2 O上胺类氧化脱氢的催化机理的细节。3种催化剂。
Selective Cleavage of the C−C Bonds of Aminoethyl Groups, via a Multistep Pathway, by a Pincer Iridium Complex
作者:Xiawei Zhang、Thomas J. Emge、Rajshekhar Ghosh、Alan S. Goldman
DOI:10.1021/ja051300p
日期:2005.6.1
A pincer-ligated iridiumcomplex is found to react with N-ethylamines, HN(Et)R (R = cyclohexyl, tert-butyl, ethyl), to give the corresponding iridium isocyanide complexes (PCP)Ir(CH3)(H)(CNR) (PCP = kappa3-2,6-(tBu2PCH2)2C6H3). This novel, regioselective C-C bond cleavage reaction occurs readily under mild conditions (25-45 degrees C). The reaction is shown to proceed via initial dehydrogenation of
An alternative pathway for production of acetonitrile: ruthenium catalysed aerobic dehydrogenation of ethylamine
作者:Emily C. Corker、Uffe V. Mentzel、Jerrik Mielby、Anders Riisager、Rasmus Fehrmann
DOI:10.1039/c3gc36513a
日期:——
The oxidative synthesis of acetonitrile from ethylamine was studied using a supported ruthenium catalyst. The reaction was conducted in both batch and flow processes and high conversions (over 85%) were achieved in both cases. Selectivity of both reactions was improved by optimisation of reaction conditions, achieving over 90% selectivity in the batch process and 80% selectivity in the continuous flow process. The use of a selective solid catalyst that utilises a feedstock that can be derived from biomass, dioxygen as the oxidant and water as the solvent represents a new, green route for the independent and efficient production of acetonitrile.