Results 101 to 110 of about 64,409 (320)

Mechanochemical Dehalogenative Deuteration of Alkyl Halides Through Piezoelectric Catalysis Initiated by a Single‐Electron Oxidation Strategy

Advanced Science, EarlyView.
A mechanochemical method is developed using D2O and a piezoelectric catalyst to deuterate both activated and unactivated alkyl halides (Cl, Br, I) efficiently. Unlike typical mechanochemical reactions, this one starts with single‐electron oxidation. This green technique successfully deuterates various alkyl halides, including primary, secondary, and ...
Ruiling Qu, Ruoxuan Liu, Xiaochun He, Xuemei Zhang, Zhong Lian   +4 more
wiley   +1 more source

Dizajniranje i sinteza novih derivata tiofenkarbohidrazida, tienopirazola i tienopirimidina s antioksidativnim i antitumorskim djelovanjem [PDF]

, 2010
2-Amino-5-acetyl-4-methyl-thiophene-3-carboxylic acid ethyl ester (1) and 5-acetyl-2-amino-4-methylthiophene-3-carbohydrazide (2) were synthesized and used as starting materials for the synthesis of new series of 1-(5-amino-4-(3,5-dimethyl-1H-pyrazole-1 ...
A. El-Gazzar, A. El-Gazzar, A. El-Gazzar, A. Rosowsky, Ameen Abu-Hashem, E. Lissi, Farid Badria, G. Nikolakopoulos, H. Hafez, H. Lütjens, I. Heiba, K. Dore, K. Gewald, K. Ghakraborti, L. Aurelio, M. Nassan, Mohamed El-Shehry, R. Aeschlach, R. Jarvest, S. Sasaki, T. Brown, T. Fujita, V. Alagarsamy, W. Lichen, Y. Morimoto   +24 more
core   +3 more sources

The Structure of Nitro‐ and Polynitropyrazoles: X‐Ray Crystallography Versus Theoretical Calculations

Asian Journal of Organic Chemistry, EarlyView.
Abstract This publication presents the geometries of 157 nitro‐ and polynitropyrazoles. Among these, 109 compounds were theoretically studied using mainly the B3LYP/6–311++G(d,p) level of theory. Three‐parameter Lee‐Yang‐Parr (B3LYP) is a density functional theory (DFT) method widely used in computational chemistry and constitutes an acceptable ...
Rosa M. Claramunt, Marta Pérez‐Torralba, José Elguero, Ibon Alkorta   +3 more
wiley   +1 more source

tert-Butyl 4-{[5-(4-chlorophenyl)-1-(4-fluorophenyl)-1H-pyrazol-3-yl]carbonyl}piperazine-1-carboxylate

Acta Crystallographica Section E, 2010
In the title pyrazole derivative, C25H26ClFN4O3, both benzene rings are twisted out of the plane through the pyrazole ring, with dihedral angles of 67.62 (10) and 27.63 (10)° for the fluoro- and chloro-substituted rings ...
Seik Weng Ng, S. Sarveswari, V. Vijayakumar, R. Venkat Ragavan, Edward R. T. Tiekink   +4 more
doaj   +1 more source

Rapid Cycling and Exceptional Yield in a Metal-Organic Framework Water Harvester. [PDF]

, 2019
Sorbent-assisted water harvesting from air represents an attractive way to address water scarcity in arid climates. Hitherto, sorbents developed for this technology have exclusively been designed to perform one water harvesting cycle (WHC) per day, but ...
Diercks, Nicolas J, Fathieh, Farhad, Glover, T Grant, Hanikel, Nikita, Kapustin, Eugene A, Lyu, Hao, Prévot, Mathieu S, Wang, Haoze, Yaghi, Omar M   +8 more
core   +2 more sources

Die Kombination von induktiven Effekten und Dispersionskräften erhöht die bioorthogonale Reaktivität von Tetrazinen gegenüber Isonitrilen

Angewandte Chemie, EarlyView.
Substituenten, die gleichzeitig sperrig und elektronenziehend sind, können sowohl die Reaktivität von Tetrazinen gegenüber Isonitrilen als auch deren Stabilität erhöhen und damit eine zentrale Herausforderung der bioorthogonalen Chemie überwinden.
Suprakash Biswas, Andreas Löffler, Pushkar Bansal, Randall T. Peterson, Dennis Svatunek, Raphael M. Franzini   +5 more
wiley   +1 more source

Current progress in synthetic and medicinal chemistry of pyrazole hybrids as potent anticancer agents with SAR studies

Future Journal of Pharmaceutical Sciences
Background One of the most serious and potentially hazardous diseases that trouble the globe today is cancer. Among various cancer treatment options, chemotherapy is currently one of the most efficient ways to remove cancer.
Bhupender Nehra, Manoj Kumar, Viney Chawla, Pooja A. Chawla   +3 more
doaj   +1 more source

BORAZANs:  Tunable Fluorophores Based on 2-(Pyrazolyl)aniline Chelates of Diphenylboron [PDF]

, 2007
The reaction between 2-pyrazolyl-4-X-anilines, H(pzAnX), (X = para-OMe (L1), Me (L2), H (L3), Cl (L4), CO2Et (L5), CF3 (L6), CN (L7)) and triphenylboron in boiling toluene affords the respective, highly emissive N,N‘-boron chelate complexes, BPh2(pzAnX) (
Gardinier, James R., Liddle, Brendan J., Lindeman, Sergey V., Macedo, Felipe P., Morin, Tyler James, Shukla, Ruchi, Silva, Rosalice M.   +6 more
core   +1 more source

Estrogen treatment decreases matrix metalloproteinase (MMP)-9 in autoimmune demyelinating disease through estrogen receptor alpha (ERalpha). [PDF]

, 2009
Matrix metalloproteinases (MMPs) have a crucial function in migration of inflammatory cells into the central nervous system (CNS). Levels of MMP-9 are elevated in multiple sclerosis (MS) and predict the occurrence of new active lesions on magnetic ...
Du, Sienmi, Gold, Stefan M, Morales, Laurie B, Sasidhar, Manda V, Sicotte, Nancy L, Tiwari-Woodruff, Seema K, Voskuhl, Rhonda R   +6 more
core   +3 more sources

Grafting of multiwalled carbon nanotubes with pyrazole derivatives: characterization, antimicrobial activity and molecular docking study

International Journal of Nanomedicine, 2019
Nadia Hanafy Metwally,1 Gamal Riad Saad,1 Esraa Azmy Abd El-Wahab21Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt; 2Department of Engineering Mathematics and Physics, Faculty of Engineering Shoubra, Benha UniversityCorrespondence:
Metwally NH, Saad GR, Abd El-Wahab EA
doaj