Results 51 to 60 of about 3,250 (181)

Funktionalisierung von Peptiden auf der festen Phase im späten Synthesestadium

Angewandte Chemie, Volume 138, Issue 31, 27 July 2026.
Peptidmodifikationen sind für die Kontrolle der Eigenschaften von Peptidwirkstoffen von entscheidender Bedeutung. Daher sind Strategien, die einen effizienten und schnellen Einbau nicht‐kanonischer Modifikationen in Peptide in Parallelformaten ermöglichen, sehr gefragt.
Marius Werner, Truc Lam Pham, Franziska Thomas   +2 more
wiley   +1 more source

Crystal structure, Hirshfeld surface analysis and interaction energy and DFT studies of methyl 4-[3,6-bis(pyridin-2-yl)pyridazin-4-yl]benzoate

Acta Crystallographica Section E: Crystallographic Communications, 2019
The title compound, C22H16N4O2, contains two pyridine rings and one methoxycarbonylphenyl group attached to a pyridazine ring which deviates very slightly from planarity.
Mouad Filali, Lhoussaine El Ghayati, Tuncer Hökelek, Joel T. Mague, Abdessalam Ben-Tama, El Mestafa El Hadrami, Nada Kheira Sebbar   +6 more
doaj   +1 more source

Pyridine-to-Pyridazine Skeletal Editing

Journal of the American Chemical Society
Nitrogen-containing heterocycles underpin many pharmaceuticals, where subtle atomic rearrangements can markedly alter efficacy and safety. Pyridines are ubiquitous scaffolds in pharmaceuticals, yet their close analogues, pyridazines with two adjacent ring nitrogens, remain underexplored owing to limited synthetic access.
Wonjun Choi, Ahyoung Jang, Sungwoo Hong
openaire   +2 more sources

Late‐Stage Functionalization of Peptides on the Solid Phase

Angewandte Chemie International Edition, Volume 65, Issue 31, 27 July 2026.
Peptide modifications are essential to control pharmacodynamic and pharmacokinetic properties of peptide drugs. Consequently, strategies that allow for efficient and rapid incorporation of non‐canonical modifications into peptides in parallel formats are highly sought after.
Marius Werner, Truc Lam Pham, Franziska Thomas   +2 more
wiley   +1 more source

Versatile Palladium‐Catalyzed C‐H Arylation of Fluoroarenes with 2‐Chloropyridine Derivatives

Chemistry – A European Journal, Volume 32, Issue 28, 25 July 2026.
Direct C─H arylation of fluoroarenes with 2‐chloropyridines is enabled by a simple Pd/SPhos system in isopropyl acetate. The method uses inexpensive reactants and shows broad scope and high yields. DFT computations explain reactivity and selectivity.
Federico Belnome, Péter P. Fehér, András Stirling, Csongor G. Németh, Tamás Hergert, György M. Keserű, Péter Ábrányi‐Balogh   +6 more
wiley   +1 more source

Synthesis of New Polyfused Heterocycles of Biological Importance by Means of Pd(0) Catalysis

Molecules, 2003
A general synthetic methodology employing heteroaryl-aryl Suzuki coupling is reviewed, by which 15 heteroaromatic ring systems of biological interest have been prepared.
G. L. F. Lemière, B. U. W. Maes, P. Mátyus, G. Timári, Zs. Riedl, Gy. Hajós   +5 more
doaj   +1 more source

Synthesis, Characterization, and Biological Activity Study of New Heterocyclic Compounds

Engineering Proceedings
The synthesis of novel heterocyclic compounds is achieved through a multi-step process involving azo dye (S1), ester (S2), and hydrazide (S3). Initially, azo dye (S1) is synthesized through the reaction between resorcinol and p-aminobenzoic acid ...
Shahad M. Alsafy, Nour Abd Alrazzak
doaj   +1 more source

4,7-Dichloro[1,2,5]oxadiazolo[3,4-d]pyridazine 1-oxide

Molbank, 2018
Dihalogenated derivatives of [1,2,5]chalcogenadiazolo[3,4-d]pyridazines are of interest as precursors for both photovoltaic materials and biologically active compounds.
Timofey Chmovzh, Ekaterina Knyazeva, Vadim Popov, Oleg Rakitin   +3 more
doaj   +1 more source

Crystal structure and Hirshfeld surface analysis of (E)-6-(4-hydroxy-3-methoxystyryl)-4,5-dihydropyridazin-3(2H)-one

Acta Crystallographica Section E: Crystallographic Communications, 2019
In the title compound, C13H14N2O3, the dihydropyridazine ring (r.m.s. deviation = 0.166 Å) has a screw-boat conformation. The dihedral angle between its mean plane and the benzene ring is 0.77 (12)°.
Said Daoui, Cemile Baydere, Fouad El Kalai, Rafik Saddik, Necmi Dege, Khalid Karrouchi, Noureddine Benchat   +6 more
doaj   +1 more source

Electrochemical, DFT and Mont Carlo Simulations Studies to Evaluate the Inhibition Effect of Novel Pyridazine Derivatives on Iron Pitting Corrosion in 3.5 % NaCl

International Journal of Electrochemical Science, 2018
(6-Phenyl-pyridazin-3-ylsulfanyl)-acetic acid ethyl ester (PPS-A) and 4-(6-Phenyl-pyridazin-3-ylsulfanyl)-butyric acid ethyl ester (PPS-B) are synthesized and characterized as novel S-alkylated pyridazine derivatives with different side chain lengths ...
M.M. El-Deeb, N.S. Abdel-Shafi, A.H. Shamroukh   +2 more
doaj   +1 more source