Synthesis of quinoxaline, benzimidazole and pyrazole derivatives under the catalytic influence of biosurfactant-stabilized iron nanoparticles in water
作者:Satyanarayan M. Arde、Audumbar D. Patil、Ananda H. Mane、Prabha R. Salokhe、Rajashri S. Salunkhe
DOI:10.1007/s11164-020-04240-6
日期:2020.11
thermogravimetric analysis, and BET analysis. The FeNPs were amorphous in nature with average particle size ~ 19 nm and successfully employed as heterogeneous catalyst for the synthesis of quinoxaline, benzimidazole, and pyrazole derivatives in aqueous medium at ambient conditions. The FeNPs could be recycled up to five times with modest change in the catalytic activity. Graphic abstract
A new Brönsted acid hydrotrope combined catalyst (BAHC) has been developed and applied in acid catalyzed synthesis of pyrido[2,3-b]pyrazines and quinoxalines in an aqueousmedium at ambient temperature with excellent yields. Interestingly, the catalyst can be easily recovered after the reactions and reused. Furthermore, BAHC catalyst worked well and avoids the use of organic solvents. We have reported
已开发出一种新的布朗斯台德酸水溶助长剂联合催化剂(BAHC),并用于在室温下在水性介质中以优异的收率对吡啶并[2,3- b ]吡嗪和喹喔啉进行酸催化合成。有趣的是,催化剂可以在反应后容易地回收并再利用。此外,BAHC催化剂效果很好,并且避免使用有机溶剂。我们已经在本文中报道了在大气和人类生存中具有较少灾难性影响的合成途径。
Blue-red emitting materials based on a pyrido[2,3-<i>b</i>]pyrazine backbone: design and tuning of the photophysical, aggregation-induced emission, electrochemical and theoretical properties
作者:Deepak M. Kapse、Pooja S. Singh、Mohammed Ghadiyali、Sajeev Chacko、Rajesh M. Kamble
DOI:10.1039/d2ra00128d
日期:——
electronics. The molecules exhibit high thermal stability, low band gap (1.67–2.36 eV) and comparable HOMO (−5.34 to −5.97 eV) and LUMO (−3.61 to −3.70 eV) energy levels with those of reported ambipolar materials. The relationship between the geometrical structure and optoelectronic properties of the dyes, as well as their twisted molecular conformation and small singlet and triplet excitation energy difference
[EN] PYRIDOPYRAZINES AS ANTICANCER AGENTS<br/>[FR] PYRIDOPYRAZINES UTILISÉS EN TANT QU'AGENTS ANTINÉOPLASIQUES
申请人:VICHEM CHEMIE KUTATÓ KFT
公开号:WO2014106763A1
公开(公告)日:2014-07-10
The present invention relates to pyridopyrazine derivatives and solvates, hydrates and pharmaceutically acceptable salts thereof, the use of them in the prevention and/or the treatment of cancer diseases, as well as pharmaceutical compositions containing at least one of them as pharmaceutically active agent(s) together with pharmaceutically acceptable carrier, excipient and/or diluents, especially for the prevention and/or treatment of cancer diseases.˙
transfer efficiency, subsequently impacting the relative propensity of TADF and RTP. Herein, we propose a newclass of multichromophoric tridonor–acceptor (D3–A) compounds with rigid and flexible π-spacers having N-rich pyridoquinoxaline and pyridopyrazine acceptor cores, respectively. The molecule with carbazole donors meta to the quinoxaline nitrogen of the rigid pyridoquinoxaline core exhibits TADF,