Part 1: Synthesis and visible absorption spectra of some new monoazo dyes derived from ethyl 2-amino-4-(4′-substitutedphenyl)thiophenes
作者:Banu Babür、Nermin Ertan
DOI:10.1016/j.saa.2014.04.042
日期:2014.10
Series of monoazo dyes from some ethyl 2-amino-4-(4′-substitutedphenyl) thiophenes were prepared and characterized. The structure of the substances was confirmed by FT-IR, 1H NMR and mass spectroscopic techniques. The relationship among the structure of the dyes, their absorption characteristics and the solvatochromic and halochromic behaviors of the dyes were investigated. Introduction of electron-accepting
制备并表征了一些2-氨基-4-(4'-取代苯基)噻吩的单偶氮染料系列。物质的结构通过FT-IR,1 H NMR和质谱技术确认。研究了染料的结构,它们的吸收特性以及染料的溶剂变色和卤致变色行为之间的关系。将电子接受性取代基引入重氮部分会导致所有使用的溶剂发生大的红移。染料表现出正的溶剂变色作用,并讨论了与互变异构有关的溶剂变色性质。
A facile microwave-assisted Knoevenagel condensation of various aldehydes and ketones using amine-functionalized metal organic frameworks
作者:Abu Taher、Bilkis Jahan Lumbiny、Ik-Mo Lee
DOI:10.1016/j.inoche.2020.108092
日期:2020.9
Abstract An amine-functionalized metal organic framework (MOF) was used as highly efficient and recyclable heterogeneous catalyst for Knoevenagel condensation of various aromaticaldehydes and ketones in ethanol. The catalytic efficiency was demonstrated by the high conversion of the reactants with 100 % selectivity under microwave (µW) irradiation, while dramatically reduced the reaction time as compared
Amine-functionalized Metal-Organic Frameworks: An Efficient and Recyclable Heterogeneous Catalyst for the Knoevenagel Condensation Reaction
作者:Ik-Mo Lee、Abu Taher、Dong-Jin Lee、Byoung-Ki Lee
DOI:10.1055/s-0035-1561356
日期:——
A highly efficient and reusable catalyst based on metal-organic frameworks (MOF) has been synthesized by post-functionalization and applied in Knoevenagelcondensations of various aldehydes and ketones. The catalytic efficiency was demonstrated by the high conversion (over 85−98%) of the reactants under mild conditions. The catalyst maintained its unique framework after the reaction and could be recycled
Le Moal,H. et al., Bulletin de la Societe Chimique de France, 1964, p. 579 - 584
作者:Le Moal,H. et al.
DOI:——
日期:——
Novel bis-(3-cyano-2-pyridones) derivatives: synthesis and fluorescent properties
作者:Nawel Mehiaoui、Zahira Kibou、Thibault Gallavardin、Stéphane Leleu、Xavier Franck、Ricardo F. Mendes、Filipe A. Almeida Paz、Artur M. S. Silva、Noureddine Choukchou-Braham
DOI:10.1007/s11164-020-04373-8
日期:2021.4
Abstract Novel substituted bis-(3-cyano-2-pyridone) derivatives were prepared via a powerful method using enaminonitriles push–pull dienes as key building blocks. The synthesis was performed in three steps from easily accessible starting materials in good yields. All target products were structurally elucidated by spectroscopic data. The reaction mechanism for formation of bis (3-cyano-2-pyridone)