Synthesis of β-ketoiminate and β-iminoesterate tungsten (VI) oxo-alkoxide complexes as AACVD precursors for growth of WO thin films
摘要:
The tungsten (VI) oxo-alkoxide complexes WO(OR)(3)L [R = Bu-t; L = acNac, etNac, tbNac, acNac(Me), acNac(Et)] (1-5) and WO(OCH3)(3)(acNac) (6) have been synthesized. The isomeric purity of these complexes depends on the steric bulk of the substituent on the imino nitrogen of the chelating ligand. The thermal properties of the complexes have been evaluated to assess the effect of the beta-ketoiminate or beta-iminoesterate ligands. WO(OC(CH3)(3))(3)(acNac) (1) has been used as a precursor for aerosol assisted chemical vapor deposition (AACVD) of WOx thin films at temperatures from 250 to 450 degrees C. The results of mass spectrometry and thermolysis studies have been used to propose possible precursor decomposition pathways during film deposition. (C) 2018 Elsevier Ltd. All rights reserved.
摘要 β-烯胺酮及其衍生物已经出现在最好的生物活性中间体中。通过在磁性可分离的钴铁氧体纳米粒子(CoFe 2 O 4 NPs)上用环状/无环的1,3-二酮处理取代的芳香族和脂肪族胺,可以实现几种β-烯酮的高收率(86-97%)。后者是在共沉淀条件下制备的。通过傅立叶变换红外光谱,X射线衍射,能量色散X射线光谱法,扫描电子显微镜,振动样品磁法和热重分析分析,确认了其纯度,精细的结晶度,元素分布,形态,磁性和热稳定性。因此,CoFe 2 O 4NPs是合成β-烯胺酮的优良绿色异质纳米催化剂,具有良好的可回收性,但其活性却微不足道。 图形概要
A highly site-selective acyloxylation of stable enamines with PhI(OAc)2 under metal-free conditions to afford (E)-vinyl acetate derivatives in good to excellent yields is described. Depending on the judicious choice of the solvent system, either the α- or β-site-selective product could be obtained with high selectivity. For the α-site-selective product, the rearranged amide compound is obtained as
Amine-catalyzed synthesis of N2-sulfonyl 1,2,3-triazole in water and the tunable N2-H 1,2,3-triazole synthesis in DMSO via metal-free enamine annulation
作者:Yanhui Guo、Yunyun Liu、Jie-Ping Wan
DOI:10.1016/j.cclet.2021.08.003
日期:2022.2
N2-H 1,2,3-triazoles via organocatalytic annulation of enaminone/enaminoester with sulfonylazide has been realized. The unconventional selectivity providing N2-sulfoyl 1,2,3-triazoles takes place in pure water, wherein the hydrogen bond effect between water and the intermediate resulting from enamine-azide corporation accounts for the novel reaction selectivity. On the other hand, the reactions conducted
Cu-Mediated Expeditious Annulation of Alkyl 3-Aminoacrylates with Aryldiazonium Salts: Access to Alkyl <i>N</i><sup>2</sup>-Aryl 1,2,3-Triazole-carboxylates for Druglike Molecular Synthesis
作者:Hao-Nan Liu、Hao-Qiang Cao、Chi Wai Cheung、Jun-An Ma
DOI:10.1021/acs.orglett.0c00006
日期:2020.2.21
Alkyl N-aryl 1,2,3-triazole-carboxylates are important molecules or intermediates in medicinal chemistry, but the synthesis of N2-aryl counterparts remains elusive. Herein, we describe a Cu-mediated annulation reaction of alkyl 3-aminoacrylates with aryldiazonium salts, both of which are readily available substrates. Furthermore, alkyl 2-aminoacrylates are also viable substrates. Diverse alkyl N2-aryl
作者:Yulia A. Zobenko、Stefania A. Pozhidaeva、Anna K. Kuratova、Larisa V. Glyzdinskaya、Marina A. Vorontsova、Galina P. Sagitullina
DOI:10.1007/s10593-017-2164-z
日期:2017.9
Rearrangement of quaternary 6-aryl-2-methyl-3(5)-nitropyridinium salts was used for the synthesis of unsymmetrical nitrobiaryls. The starting nitropyridines were obtained by a three-component one-pot synthesis, two-step Hantzsch synthesis using nitro ketones, and by cyclocondensation of acylpyruvates with enamines derived from nitroacetone and nitroacetophenones.
[EN] 1H- PYRROLO [2, 3 -B] PYRIDINE DERIVATIVES AND THEIR USE AS RADICAL QUENCHERS<br/>[FR] DÉRIVÉS 1H-PYRROLO [2,3-B] PYRIDINE ET LEUR UTILISATION COMME AGENTS DE TREMPE DE RADICAUX
申请人:UNIV ARIZONA
公开号:WO2013120081A1
公开(公告)日:2013-08-15
The present disclosure provides biologically active compounds of formula (I): and pharmaceutically acceptable salts thereof, compositions comprising these compounds, and methods of using these compounds in a variety of applications, such as treatment or suppression of diseases associated with decreased mitochondrial function resulting in diminished ATP production and/or oxidative stress and/or lipid peroxidation.