Title:Synthesis, Characterization and Biological Activity of Benzimidazoleacrylonitrile
Derivatives
Volume: 20
Issue: 4
Author(s): Mehtab Parveen*, Mohammad Azeem, Afroz Aslam, Mohammad Haris, Amir Khan and Mahboob Alam
Affiliation:
- Department of Chemistry, Division of Natural Products, Aligarh Muslim University, Aligarh, 202002, India
Keywords:
Knoevenagel condensation, 2-benzimidazolylacrylonitriles, X-ray crystallographic study, nematicidal activity, vitamin B12, anti-tumor/anti-proliferative activity.
Abstract:
Background: Benzimidazoles have a wide range of synthetic applications in medicinal
chemistry and biological activities like anti-tumor/anti-proliferative activities etc. Moreover, different
heterocyclic moieties attached to the benzimidazole ring improved anticancer activities.
Methods: All the chemicals were purchased from Aldrich Chemical Company, are of AR grade
and used as received. Microanalytical data (C, H, and N) were analyzed on a Carlo Erba model
1108 analyzer. Melting points were measured by the Kofler apparatus and were uncorrected. Spectroscopic
data were obtained using the following instruments: Fourier transform infrared spectra
(KBr discs, 4000-400 cm-1) by Shimadzu IR-408 Perkin Elmer 1800 instrument; 1H NMR and 13C
NMR spectra by JEOL Resonance Inc. Tokyo, Japan, JNM-ECZ400S/L1 using DMSO-d6 as a
solvent containing TMS as the internal standard. Chemical shifts (δ) are reported in parts per million
(ppm), and coupling constants (J) are reported in Hertz (Hz).
Results: We chose sulfosalicylic acid as a promoter for forming benzimidazole-acrylonitrile derivatives,
which is an eco-friendly reaction, and we applied a series of synthesized compounds 3a-g
in nematicidal activity. The results indicate that the concentrations of all treatments significantly
kill M. incognita.
Conclusion: This model reaction procedure provides a better method for preparing benzimidazoleacrylonitrile,
which is superior to other methods. This protocol simplifies handling model reactions
with mild reaction conditions, a short time period, a simple set-up, a fast reaction rate, and so on.