Results 61 to 70 of about 340,649 (242)
Heterocyclic Communications, 2019 New pyrazolothienopyrimidines were synthesized. The key intermediate 4-aminothieno[2,3-c]pyrazole-5-carbonitrile 1 was converted to the chloroacetyl amino derivative 2 followed by nucleophilic substitution and Dimorth rearrangement upon treatment with ...
Zaki Remon M. +3 more
doaj +1 more source
Toxicology Reports, 2015 Synthesis of bi functionally substituted thieno[2,3-c]pyrazole compounds was carried out by a new method. The substituted group at position five is namely (carbonitrile, carboxamide, N-(substitutedphenyl) carboxamide and benzoyl group). Chloroacetylation
Alaa El-Din H. Sayed +3 more
doaj +1 more source
Journal of Chemistry, 2022 Chalcones have a skeleton of diphenyls connected via an α,β-unsaturated carbonyl group. Many chalcone derivatives have been shown to interact with tubulin. Based on previous reports, chalcones derived by substitution of a carbonyl group with 2-pyrazoline
Soon Young Shin +5 more
doaj +1 more source
UTILITY OF 2- HYDRAZIN04,6 DIMETHYLPYRIMIDINE IN HETEROCY CLIC SYNTHESIS
Zagazig Journal of Pharmaceutical Sciences, 1997 2-Hydrazino-4,6-dimethy1pyridine (1) readily underwent ring closure with benzoy1 chloride to give 5,7 dimethy1-3-pheny1-1,2,4-triazolo[4,3,-a]pyrimidine (4a). Either N-benzoyl derivative (2) or the hydrazone (3a) can be used for the formation of compound
Mohamed AL Ashmawy +3 more
doaj +1 more source
, 2022 Succinate dehydrogenase (SDH) inhibitor is one of the research hotspots for the development of fungicides. Herein, we describe the design and synthesis of N-methoxy-(biphenyl-ethyl)-pyrazole-carboxamide derivatives with enhanced fungicidal activity by ...
Qiang Lu (49688) +6 more
core +1 more source
Angewandte Chemie International Edition, EarlyView.To make exceptionally effective drugs, thinking “outside the binding site” is required. This work reveals that counterintuitive targeting of a kinase‐conserved region can lead to highly selective binding. Inhibitor discovery coupled to x‐ray crystallography shows that a network of noncanonical interactions and long‐range effects of distant unique amino
Nico J. Seidler +20 more
wiley +1 more source
New 2-Methoxy Acetylenic Acids and Pyrazole Alkaloids from the Marine Sponge Cinachyrella sp.
Marine Drugs, 2017 Three new 2-methoxy acetylenic acids (1–3) and a known derivative (4), in addition to three new natural pyrazole alkaloids (5–7) were isolated from an Indonesian marine sponge of the genus Cinachyrella.
Amin Mokhlesi +8 more
doaj +1 more source
Crystal structure of ethyl 4-[(1H-pyrazol-1-yl)methyl]benzoate
Acta Crystallographica Section E, 2014 In the title molecule, C13H14N2O2, the dihedral angle between the pyrazole and benzene ring mean planes is 76.06 (11)°, and the conformation of the ethyl side chain is anti [C—O—C—C = −175.4 (3)°].
Ju-Xian Wang, Chao Feng
doaj +1 more source
, 2023 Providing green methods for the synthesis of new heterocyclic compounds with biological properties is interesting for scientists. Through the multi-component reaction of aldehyde derivatives, methyl 2-cyanoacetate, and phenylhydrazine using K2CO3, and ...
Benien M. Ridha (16499580) +8 more
core +1 more source
Fluorogenic Sydnones for Bioorthogonal Labeling of DNA
Chemistry – A European Journal, EarlyView.Conjugates of sydnones with cyanine‐styryl dyes combine bioorthogonal reactivity with fluorogenicity. The reactivity with bicyclo[6.1.0]non‐4‐yne (BCN)‐modified DNA showed second‐order rate constants of up to k2 = 2,300 M−1s−1 and fluorescence turn‐on by one magnitude of order.
Kerstin Müller +1 more
wiley +1 more source