A series of novel Schiff base containing bis-1,2,4-triazole and bis-hydrazone derived from terephthalic dihydrazide was synthesized. All the newly synthesized compounds were characterized by (1)H, (13)C NMR, mass spectra, FTIR and elemental analysis. UV-vis spectra and fluorescent spectra of the compounds were recorded. The effect of substituent such as electron withdrawing and electron donating groups on the fluorescent spectra was studied. Also, the comparative discussion on fluorescent spectra of Schiff's base and hydrazones has been described. The antioxidant activity of the compounds revealed that compound 5c and 5f are the most potent compounds in this series.
A new class of functionalized furan and 5-(p-chlorophenyl)furan containing spiropyrrolidines has been synthesized in moderate to excellent yields by the one-pot, three-component 1,3-dipolar cycloaddition reaction of in situ generated azomethine ylides with various furan/aryl furan-substituted chalcones as dipolarophiles. The effect of electron deficient substituents at the fifth position of the furan ring in the chalcone on the regiochemistry of the cycloaddition formed was studied. The structures of the newly synthesized cycloaddicts were proved by analytical and spectral data.
In the title compound, C7H8N6O2S, the dihedral angle between the imidazole and thiadiazole rings is 70.86 (15)°. In the crystal, molecules are linked into [10-1] chains by N—H⋯N hydrogen bonds, which incorporate centrosymmetric R
2
2(8) and R
2
2(18) loops. The chains are linked by C—H⋯O and C—H⋯N interactions, generating a three-dimensional network. Very weak π–π stacking [centroid–centroid distance = 3.901 (17) Å] is also observed.
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