Beilstein Journal of Organic Chemistry, 2021 The synthesis of novel polycyclic π-conjugated dihydropyridazines, pyridazines, and pyrroles was studied. Dihydropyridazine dyes were synthesized by inverse electron-demand Diels–Alder cycloaddition reactions between a dibenzosuberenone and tetrazines ...
Ramazan Kocak, Arif Dastan
exaly +3 more sources
Novel Ring Systems: Spiro[Cycloalkane] Derivatives of Triazolo- and Tetrazolo-Pyridazines
Molecules, 2021 In orderto synthesize new pyridazine derivatives anellated with different nitrogen heterocyclic moieties, spiro[cycloalkane]pyridazinones were transformed into the corresponding thioxo derivatives via a reaction with phosphorus pentasulfide. The reaction
Csilla Sepsey Für +2 more
exaly +4 more sources
Synthetic Pathways to Pyrido[3,4-c]pyridazines and Their Polycyclic Derivatives
Organics, 2022 Pyrido[3,4-c]pyridazines are nitrogen-containing scaffolds that have been described as being promising in medicinal chemistry, but they are rather rare chemicals.
Temitayo Omowumi Alegbejo Price +2 more
doaj +2 more sources
5-Aminopyrazole Dimerization: Cu-Promoted Switchable Synthesis of Pyrazole-Fused Pyridazines and Pyrazines via Direct Coupling of C-H/N-H, C-H/C-H, and N-H/N-H Bonds [PDF]
MoleculesA Cu-promoted highly chemoselective dimerization of 5-aminopyrazoles to produce pyrazole-fused pyridazines and pyrazines is reported. The protocol generates switchable products via the direct coupling of C-H/N-H, C-H/C-H and N-H/N-H bonds, with the ...
Yi-Xin Chai +11 more
doaj +2 more sources
Formal [4 + 2] combined ionic and radical approach of vinylogous enaminonitriles to access highly substituted sulfonyl pyridazines [PDF]
Communications ChemistryPyridazine derivatives hold significant interest due to their broad applications in pharmaceuticals and materials science, where they serve as valuable scaffolds for bioactive compounds and functional materials.
Chanhyun Jung +10 more
doaj +2 more sources
Molecules, 2000 Pyrrolidino[3,4-c]pyrazoline and pyrazole derivatives were synthesized via reactions of a substituted hydrazonoyl bromide with N-arylmaleimides and active methylene reagents, respectively. Synthesized pyrazoles were reacted with hydrazine hydrate to give
Abdou O Abdelhamid
exaly +3 more sources
Identification of new 4-(6-oxopyridazin-1-yl)benzenesulfonamides as multi-target anti-inflammatory agents targeting carbonic anhydrase, COX-2 and 5-LOX enzymes: synthesis, biological evaluations and modelling insights [PDF]
Journal of Enzyme Inhibition and Medicinal Chemistry, 2023 Multiple inhibitions of CA, COX-2 and 5-LOX enzymes has been recognised as a useful strategy for the development of anti-inflammatory drugs that can avoid the disadvantages of using NSAIDs alone.
Waleed A. Badawi +13 more
doaj +2 more sources
Beilstein Journal of Organic Chemistry, 2017 The novel cascade two-stage reaction between itaconimides and 1,2-diamino-4-phenylimidazole proceeds regio- and chemoselectively to form tetrahydroimidazo[1,5-b]pyridazines and includes nucleophilic C-addition by the activated C=C double bond and ...
Dmitriy Yu Vandyshev +2 more
exaly +2 more sources
Novel green synthesis of polyfunctionally substituted phthalazines promoted by visible light, DFT studies and molecular docking with antimicrobial and antibiofilm potency [PDF]
Scientific ReportsVisible-Light-Mediated synthesis is a green and efficient technique that has garnered interest from organic chemists. A new series of polyfunctionally substituted phthalazine derivatives 3a–j were synthesized via a metal-free reaction of pyridazines 1a–d
Ramadan A. Mekheimer +5 more
doaj +2 more sources
A One-Pot Approach to Novel Pyridazine C-Nucleosides
Molecules, 2021 The synthesis of glycosides and modified nucleosides represents a wide research field in organic chemistry. The classical methodology is based on coupling reactions between a glycosyl donor and an acceptor.
Flavio Cermola +4 more
doaj +1 more source