Abstract
Background: A new series of malonic acid-based hydrazide derivatives (BPMPDH, 2HPMPDH, 3HPMPDH, 4HPMPDH, DMPDH) were successfully synthesized by the reaction of malonic ester hydrazide with various aldehydes like salicylaldehyde, benzaldehyde, 4-hydroxy benzaldehyde, 3-hydroxy benzaldehyde and formaldehyde.
Objectives: Furthermore, metal complexes of prepared hydrazide derivatives were prepared using metals like Cu+2, Zn+2 and Ni+2 in a mild efficient and convenient method.
Methods: Newly synthesized compounds have been described by IR, NMR (1H & 13C), UV/VIS and mass spectrometry. The presence of –C=N- peak at 1600-1700 cm-1 with the absence of NH2 peak at 3500 cm-1 in FTIR spectra and chemical change at 11.00-13.00 ppm for –OH protons, even chemical changes varying from 7.00-9.50 ppm for –NH verified synthesis of modern Dihydrazide derivatives. The presence of a C-OH sharp peak at 180-190 ppm, a C=O peak at 160-170 ppm and a C=N peak at 140-150 ppm have shown the development of compounds. The presence of molecular ion peaks at 308 m/z, 340 m/z and 156 m/z, respectively, provides a good indication of the synthesis of the possible Dihydrazide derivatives.
Results: Synthesized compounds have also been analyzed for their antioxidant, antibacterial, antifungal, chymotrypsin and tyrosinase inhibition activities. The findings of activities revealed that the 2HPMPDH, 3HPMPDH, 4HPMPDH and their Cu+2 and Zn+2 metal complexes showed more successful inhibitions against standard drugs.
Conclusion: In addition, structural behavior and metal complexes vs. ligand activity interaction were also discussed in this research, which indicated that the existence of electron-donating groups and transition metals improved the biological activities of the studied compounds.
Keywords: Malonic Ester, Hydrazide, Dihydrazide Compounds, Dihydrazide Derivative Metal Complexes, Biological Activities.
Graphical Abstract
[http://dx.doi.org/10.1007/s11094-006-0048-0]
[http://dx.doi.org/10.1016/j.molstruc.2019.126885]
[http://dx.doi.org/10.1016/j.molstruc.2021.131181]
[http://dx.doi.org/10.1016/j.molstruc.2020.129665]
[http://dx.doi.org/10.1080/17518253.2017.1293177]
[http://dx.doi.org/10.1016/j.bioorg.2020.104168] [PMID: 32947133]
[http://dx.doi.org/10.1016/j.bmcl.2020.127359] [PMID: 32738998]
[http://dx.doi.org/10.1007/s11030-020-10084-4] [PMID: 32301032]
[http://dx.doi.org/10.3390/molecules25153429] [PMID: 32731576]
[http://dx.doi.org/10.1016/j.xphs.2020.08.014] [PMID: 32860799]
[http://dx.doi.org/10.1016/j.molstruc.2020.128885]
[http://dx.doi.org/10.1016/j.fct.2021.112312] [PMID: 34102214]
[http://dx.doi.org/10.1155/2017/5465890]
[http://dx.doi.org/10.1007/s00044-012-0302-9] [PMID: 23710121]
[http://dx.doi.org/10.1007/978-3-030-44176-0_8]
[http://dx.doi.org/10.1016/j.redox.2020.101486] [PMID: 32155582]
[http://dx.doi.org/10.1016/j.molstruc.2020.129864]
[http://dx.doi.org/10.1016/j.ica.2020.119434]
[http://dx.doi.org/10.1016/j.mcat.2021.112055]
[http://dx.doi.org/10.1016/j.arabjc.2020.10.034]
[http://dx.doi.org/10.4236/msce.2020.812002]
[http://dx.doi.org/10.2174/1389557519666190913145423] [PMID: 31518221]
[http://dx.doi.org/10.4236/ojic.2018.81003]
[http://dx.doi.org/10.1016/0022-1902(74)80061-8]
[http://dx.doi.org/10.1071/CH9662285]
[http://dx.doi.org/10.1016/j.fct.2021.112008] [PMID: 33508417]
[http://dx.doi.org/10.1016/j.saa.2009.08.042] [PMID: 19783202]
[http://dx.doi.org/10.1016/j.mseb.2020.114766]
[http://dx.doi.org/10.1016/S0277-5387(00)86139-2]
[http://dx.doi.org/10.1002/hc.20572]
[http://dx.doi.org/10.1016/j.poly.2008.04.018]
[http://dx.doi.org/10.1007/s11243-004-3173-1]
[http://dx.doi.org/10.1016/j.ica.2014.06.014]
[http://dx.doi.org/10.1016/j.molliq.2020.114977]
[http://dx.doi.org/10.1007/s00775-014-1219-1] [PMID: 25467055]
[PMID: 33340117]