A novel nanomagnetic solid acid catalyst for the synthesis of new functionalized bis‐coumarin derivatives under microwave irradiations in green conditions
water undermicrowaveirradiationconditions. Scanning electron microscopy, transmission electron microscopy, energy‐dispersive X‐ray spectroscopy, X‐ray diffraction, thermogravimetric analysis, dynamic light scattering, vibrating sample magnetometry, Fourier transform infrared spectroscopy, UV–visible absorption, and Brunauer‐Emmett‐Teller (BET) techniques confirmed the successful synthesis of the
在这项研究中,基于磺基水杨酸固定在Fe 3 O 4纳米颗粒(Fe 3 O 4上)上的新型,绿色,环保和磁性异构催化剂报道了磺基水杨酸MNP)。使用1当量的芳基醛与2当量的4-羟基香豆素在微波辐射条件下反应,可以高收率合成双香豆素类似物。扫描电子显微镜,透射电子显微镜,能量色散X射线光谱法,X射线衍射,热重分析,动态光散射,振动样品磁力分析法,傅立叶变换红外光谱法,紫外可见吸收和Brunauer-Emmett-Teller(BET )技术证实了催化剂的成功合成。提出的绿色方案的主要吸引人的特点是反应时间非常短(10-15分钟),产率极高,并且避免了有害或有毒的试剂和溶剂。耐热性强,易于分离,
Visible Light-Induced Synthesis of Biscoumarin Analogs under Catalyst-Free Conditions
Biscoumarin analogs were synthesized by the reaction between two equivalent of 4‐hydroxycoumarin and one equivalent of aryl aldehydes induced by visible light [22 W compact fluorescent lamp (CFL) bulb]. This new method is simple, cost‐effective, and furnished excellent yields with broad substrate generality in short reaction time.
Bis-(Coumarin) Compounds With Anti-Inflammatory Activity
申请人:Mercep Mladen
公开号:US20080153872A1
公开(公告)日:2008-06-26
Certain bis-(coumarin) compounds as well as the products of their intramolecular cyclization including pharmaceutically acceptable salts, hydrates, solvates, clathrates, prodrugs, tautomers and stereoisomers thereof are disclosed. Certain processes and intermediates for the preparation of certain bis-(coumarin) compounds, as well as for the use of these compounds as therapeutically active agents in the prophylaxis and treatment of asthma and other inflammatory diseases and conditions in mammals, especially humans are also disclosed.
Electronic Structure, Optical Properties and Quantum Chemical Investigation on Synthesized Coumarin Derivative in Liquid Media for Optoelectronic Devices
作者:A. G. Pramod、C. G. Renuka、Y. F. Nadaf
DOI:10.1007/s10895-019-02409-w
日期:2019.7
bandgap so that the 3-BMH molecule can be used as a potential material for the optoelectronic application. Also, from results of quantum chemical studies, the electrostatic potential maps studies reveal the molecule is how much stable it describes the defining reactivity of the molecule towards positively and negatively charged reactants, size, shape, the location of nucleophilic and electrophilic sites