Results 41 to 50 of about 9,953 (212)

The Joint Center for Energy Storage Research: A New Paradigm for Battery Research and Development

, 2015
The Joint Center for Energy Storage Research (JCESR) seeks transformational change in transportation and the electricity grid driven by next generation high performance, low cost electricity storage.
Crabtree, George
core   +1 more source

Antitumor studies. Part 4: Design, synthesis, antitumor activity, and molecular docking study of novel 2-substituted 2-deoxoflavin-5-oxides, 2-deoxoalloxazine-5-oxides, and their 5-deaza analogs [PDF]

, 2008
Various novel 10-alkyl-2-deoxo-2-methylthioflavin-5-oxides and their 2-alkylamino derivatives were prepared by facile nitrosative cyclization of 6-(N-alkylanilino)-2-methylthiopyrimidin-4(3H)-ones followed by nucleophilic replacement of the 2-methylthio ...
Ali, Hamed I., Ashida, Noriyuki, Nagamatsu, Tomohisa   +2 more
core   +1 more source

Synthesis and Reactions of Quinoxaline Derivatives [PDF]

Bulletin of the Chemical Society of Japan, 1984
Abstract Reaction of 3-methyl-2(1H)quinoxalinone (1) with alkyl, benzyl, and arenesulfonyl halides in the presence of K2CO3 in dry acetone gave 1-substituted 3-methyl-2(1H)-quinoxalinones (2a–g). However 1 reacts with benzoyl chloride under the same conditions to give 3-methyl-2-quinoxalinyl benzoate, while it reacts with P2S5 in dry ...
Mahmoud Zarif Amin Badr, Galal Moustafa El-Naggar, Hassan Ahmad Hassan El-Sherief, Safar Ahmed Mahgoub   +3 more
openaire   +1 more source

Scope and Mechanistic Study of the Ruthenium-Catalyzed \u3cem\u3eortho\u3c/em\u3e-C−H Bond Activation and Cyclization Reactions of Arylamines with Terminal Alkynes [PDF]

, 2005
The cationic ruthenium hydride complex [(PCy3)2(CO)(CH3CN)2RuH]+BF4- was found to be a highly effective catalyst for the C−H bond activation reaction of arylamines and terminal alkynes.
Yi, Chae S., Yun, Young
core   +1 more source

Bromination of quinoxaline and derivatives: Effective synthesis of some new brominated quinoxalines

Tetrahedron, 2017
Abstract The synthesis of brominated quinoxaline derivatives starting from several kinds of quinoxaline by different bromination strategies was studied. First the synthesis of some brominated quinoxalines was accomplished along with the development of an alternative and effective synthesis of some known compounds.
Ucar, Sefa, Essiz, Selcuk, Dastan, Arif
openaire   +4 more sources

Reinforcement of Cathode Interface Using a Dipolar Small Molecule for Enhancing Operational Stability of Perovskite Solar Cells

Advanced Science, EarlyView.
We report a high‐dipole interlayer, MQPPO, that simultaneously improves efficiency and stability in perovskite solar cells. Its strong interfacial dipole enhances photovoltaic performance, while its uniform coverage and strong interaction with Ag effectively suppress AgI formation, ensuring long‐term stability under moisture and thermal stress.
Dong Hyun Lee, Seok Woo Lee, Min Jun Choi, Ramesh Kumar Chitumalla, Sang Eun Yoon, Gyeong G. Jeon, Juan Anthony Prayogo, Dong Won Kim, Joonkyung Jang, Jinhee Heo, Dong Wook Chang, Jong H. Kim   +11 more
wiley   +1 more source

Enhanced Energy Transfer from a Metal–Organic Framework to a Highly Confined Organic Phosphorescent Dye

Advanced Science, EarlyView.
A phosphorescent dye was designed to fit in a hand‐to‐glove fashion into the 1D‐pore channels of MIL‐68(In). We synthesized MIL‐68(In) as powder and thin films, loaded the dye into the pores with controlled packing, and found that the phosphorescence and quantum yield are enhanced.
Bahram Hosseini Monjezi, Thomas Kasper, Gloria Hong, Changfeng Si, Robert Oestreich, Oliver Weingart, Peter G. Weidler, Christof Wöll, Eli Zysman‐Colman, Christoph Janiak, Stefan Bräse, Klaus Müller‐Buschbaum, Alexander Knebel   +12 more
wiley   +1 more source

Tripodal molecules with triphenylamine core, diazine peripheral groups and extended π-conjugated linkers [PDF]

, 2016
International audienceA series of five octupolar molecules with central triphenylamine donor and peripheral diazine electron-withdrawing groups has been prepared.
Achelle, Sylvain, Bureš, Filip, Cabon, Nolwenn, Cvejn, Daniel, Malval, Jean-Pierre, Pytela, Oldřich, Robin-Le Guen, Françoise, Spangenberg, Arnaud   +7 more
core   +3 more sources

[EMIM]AlCl4-ionic liquid catalyzed mechanochemically assisted green approach towards the synthesis of quinoxaline, 6H-indolo[2,3-b]quinoxaline and benzimidazole derivatives

Results in Chemistry
In the presented work, a convenient and effective methodology for the synthesis of quinoxaline, 6H-indolo[2,3-b]quinoxaline and benzimidazole derivatives has been developed.
Shafaque M. Shaikh, Gulafshan M. Ansari, Zobia Z. Karbari, Aditi A. Babre, Vikas V. Borge, Vikas M. Bangade, Damodara N. Kommi, Bhushan B. Popatkar   +7 more
doaj   +1 more source

Synthesis of pyrimido[1,6-a]quinoxalines via intermolecular trapping of thermally generated acyl(quinoxalin-2-yl)ketenes by Schiff bases

Beilstein Journal of Organic Chemistry, 2018
Acyl(quinoxalin-2-yl)ketenes generated by thermal decarbonylation of 3-acylpyrrolo[1,2-a]quinoxaline-1,2,4(5H)-triones react regioselectively with Schiff bases under solvent-free conditions to form pyrimido[1,6-a]quinoxaline derivatives in good yields.
Svetlana O. Kasatkina, Ekaterina E. Stepanova, Maksim V. Dmitriev, Ivan G. Mokrushin, Andrey N. Maslivets   +4 more
doaj   +1 more source