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Beilstein J. Org. Chem. 2024, 20, 1069–1075, doi:10.3762/bjoc.20.94
Graphical Abstract
Figure 1: Some examples of biologically active isoxazolo[4,5-b]pyridines with antibacterial [8], anticancer [12] and...
Scheme 1: Methods for the synthesis of isoxazolo[4,5-b]pyridines: (A) annulation of an isoxazole fragment to ...
Scheme 2: Synthesis of ethyl 6-R-isoxazolo[4,5-b]pyridine-3-carboxylates 4a–c.
Scheme 3: Synthesis of isonitroso compounds 7.
Scheme 4: Base-promoted cyclization of compounds 7a–c.
Scheme 5: Synthesis and rearrangement of arylhydrazones 12.
Figure 2: Biologically active analogs of compounds 13.
Figure 3: X-ray crystal structures of compounds 12c (top left; the second crystallographically unique molecul...
Beilstein J. Org. Chem. 2017, 13, 2854–2861, doi:10.3762/bjoc.13.277
Scheme 1: Beirut reaction.
Scheme 2: Reactivity of 4,6-dinitrobenzofuroxan.
Scheme 3: Reactivity of ANBF (1).
Scheme 4: Synthesis of ANBF.
Scheme 5: Reactions of ANBF with β-dicarbonyl compounds.
Figure 1: General view of molecule 12 in crystal. Anisotropic displacement parameters for non-hydrogen atoms ...
Scheme 6: Reaction of ANBF with 2,4,6-trinitrotoluene.
Figure 2: Partial 1H NMR spectrum of compound 15 in DMSO-d6.
Figure 3: General view of molecule 15 in crystal. Anisotropic displacement parameters for non-hydrogen atoms ...
Scheme 7: Plausible mechanism of adducts formation.