Results 51 to 60 of about 25,177 (318)

Studies on Log Po/w of Quinoxaline di-N-Oxides: A Comparison of RP-HPLC Experimental and Predictive Approaches

open access: yesMolecules, 2011
As reported in our previous papers, a series of quinoxaline-2-carboxamide 1,4-di-N-oxide derivatives were synthesized and studied as anti-tuberculosis agents. Here, the capability of the shake-flask method was studied and the retention time (expressed as
James A. Platts   +7 more
doaj   +1 more source

Microwave assisted synthesis of quinoxaline derivatives

open access: yesResults in Chemistry, 2023
Substituted quinoxalines are known building blocks for compounds with pharmacological, agricultural, and material uses. Forming carbon-heteroatom bonds at the 2,3-positions on quinoxaline can be challenging. 2,3-chloroquinoxaline can undergo nucleophilic
Lucas K. Beagle   +3 more
doaj  

Recent Advances in Wide‐Bandgap Perovskite Solar Cells

open access: yesAdvanced Materials, EarlyView.
Ubiquitous defects predominately account for photo‐instability and open‐circuit voltage losses in wide‐bandgap perovskite solar cells (WBG PSCs). This review comprehensively presents the underlying impact mechanisms, summarizes the advanced optimization strategies across various functional layers and their interfaces to develop efficient and stable WBG
Jianjun Mei, Feng Yan
wiley   +1 more source

INVESTIGATION DICARBONYL COMPOUNDS GENERATED FROM THE MAILLARD REACTIONS OF METHIONINE WITH REDUCING SUGARS TO ENFOLD OFF FLAVOR IN GOAT’S MILK [PDF]

open access: yes, 2016
Population of goat in Indonesia remains low and stagnant (about 1.2 % per year). In the other hand, Indonesia is a tropical country, which is suite for the goat’s growth. One of strong reason is low in goat-based product’s demand since “goaty” flavor
AL-BAARRI, Ahmad Nimatullah   +1 more
core  

Thermochemical and Theoretical Studies of 2-Hydroxyquinoxaline, 2,3-Dihydroxyquinoxaline, and 2-Hydroxy-3-methylquinoxaline [PDF]

open access: yes, 2000
The standard (p° = 0.1 MPa) molar enthalpies of formation for crystalline 2-hydroxyquinoxaline, 2,3-dihydroxyquinoxaline, and 2-hydroxy-3-methylquinoxaline were derived from the standard molar enthalpies of combustion, in oxygen, at T = 298.15 K ...
Matos, M. A. R.   +4 more
core   +1 more source

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

open access: yesTetrahedron, 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.
Sefa Uçar   +3 more
openaire   +5 more sources

Molecular Interlayer for High‐Performance and Stable 2D Tin Halide Perovskite Transistor

open access: yesAdvanced Science, EarlyView.
Molecular interlayers are designed for p‐channel 2D Sn halide thin‐film transistors, yielding exceptional performance metrics, a significant reduction in hysteresis, and enhanced ambient stability. The effectiveness of new molecular interlayers (TPOF1, TPOF2, and 2F‐TOPF2) is confirmed by surface treatment, demonstrating remarkable carrier mobility ...
Bum Ho Jeong   +6 more
wiley   +1 more source

Quinoxaline chemistry. Part 8. 2-[anilino]-3- [carboxy]-6(7)-substituted quinoxalines as non classical antifolate agents. Synthesis and evaluation of in vitro anticancer, anti-HIV and antifungal activity [PDF]

open access: yes, 1997
Thirty quinoxalines bearing a substituted anilino group on position 2, a carboethoxy or carboxy group on position 3 and a trifluoromethyl group on position 6 or 7 of the heterocycle were prepared in order to evaluate in vitro anticancer activity ...
Loriga, Mario   +3 more
core  

An Electrochemically‐Driven Reconstruction Strategy to Realize Highly Crystalline Covalent Organic Frameworks for Enhanced Hydrogen Evolution Reaction

open access: yesAdvanced Science, EarlyView.
An electrochemically‐driven reconstruction strategy is proposed to convert low‐crystalline imine‐linked polymers into highly crystalline, structurally ordered COFs with enhanced HER activity, which offers new insights into the structural modulation of COFs and facilitates the design of more advanced metal‐free electrocatalysts.
Yuxin Ren   +9 more
wiley   +1 more source

Green oxidations: Titanium dioxide induced tandem oxidation coupling reactions

open access: yesBeilstein Journal of Organic Chemistry, 2009
The application of titanium dioxide as an oxidant in tandem oxidation type processes is described. Under microwave irradiation, quinoxalines have been synthesized in good yields from the corresponding α-hydroxyketones.
Vineet Jeena, Ross S. Robinson
doaj   +1 more source

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