Results 21 to 30 of about 4,025 (222)
Molecules, 2017 Efficient synthesis of phenanthridin-6(5H)-one derivatives 12a–n in a four-component reaction of aldehyde hydrazone, aromatic aldehydes and malononitrile in Q-Tubes is reported. The results showed that the methodology has the advantage of being a one-pot
Majdah A. AL-Johani +5 more
doaj +1 more source
Synthesis of Phosphorus(V)-Substituted Six-Membered N-Heterocycles: Recent Progress and Challenges
Molecules, 2023 Heterocycles functionalized with pentavalent phosphorus are of great importance since they include a great variety of biologically active compounds and pharmaceuticals, advanced materials, and valuable reactive intermediates for organic synthesis ...
Yulia Volkova, Igor Zavarzin
doaj +1 more source
Molecules, 2013 Aiming for the synthesis of new heterocyclic compounds containing a sulfonamido moiety suitable for use as antibacterial agents, the precursor ethyl {[4-N-(4,6-dimethylpyrimidin-2-yl)sulfamoyl]phenylazo}cyanoacetate was reacted with a variety of active ...
Eman A. El-Bordany +2 more
doaj +1 more source
International Journal of Electrochemical Science, 2020 The present study theoretically investigates the molecular properties of two pyridazine derivatives (5-benzyl-6-methyl pyridazine-3-one, PO and 5-benzyl-6-methyl pyridazine-3-thione, PS) using quantum chemical technique (Parameterization Method 3). It is
Ubong Eduok
doaj +1 more source
Pyridazinone Compounds: A Mini review on their antifungal activities
International Journal of New Chemistry, 2020 Pyridazine derivatives represent one of the most active classes of compounds possessing a wide spectrum of biological activity. They are widely used in pharmaceuticals and agrochemicals.
Mohammad Asif Abida , Md Tauquir Alam
doaj +1 more source
Pyridine C─N Transposition via Cycloaddition–Cycloreversion
Angewandte Chemie, EarlyView.Transposition of pyridine nitrogen from the 4‐ to the 3‐position is described using two open and shut sequences: a nucleophile addition ring‐open ring‐closure, followed by a nitrile Diels–Alder cycloaddition cycloreversion. The nitrogen swap is particularly effective for tertiary alkyl substituents, transforming easily accessible para‐alkylated ...
Aífe Conboy, Michael F. Greaney
wiley +2 more sources
Coordination‐Driven Direct C─H Metalation of N‐Heterocycles With a Superbasic Co(II) Amide Co(TMP)2
Angewandte Chemie, EarlyView.By enabling regioselectivities that are inaccessible with conventional bases, this study introduces a Co(II) amide platform for the deprotonative C─H metalation of sensitive N‐heterocycles. Subsequent interception of the resulting Co(II) intermediates with external oxidants affords a family of sterically congested, TMP‐substituted heterocycles via C─N ...
Na Jin +3 more
wiley +2 more sources
Reactivity and Synthetic Applications of 4,5-Dicyanopyridazine: An Overview
Molecules, 2010 Despite the poor reputation of electron-deficient pyridazines in intermolecular Hetero Diels-Alder (HDA) reactions, 4,5-dicyanopyridazine (DCP) showed a surprising reactivity as a heterocyclic azadiene in inverse electron-demand HDA processes with ...
Donatella Giomi +2 more
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Molecules, 2021 A series of novel 3-phenoxy-4-(3-trifluoromethylphenyl)pyridazines 2–5 were designed, based on the structure of our previous lead compound 1 through the in silico structure-guided optimization approach. The results showed that some of these new compounds
Lijun Yang +7 more
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Synthesis and Characterization of Unique Pyridazines
, 2022 The field of semiconductive organic chemistry is vast and expanding as numerous applications are being discovered for semiconductors. The research reported in this thesis focuses on the synthesis and characterization of three pyridazines. Pyridazines are
Hobbs, William
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