Synthesis of N-Phenylpyrazoline Derivative from 4-Chlorobenzaldehyde and 4-Chloroacetophenone and its Activity as an Antimalarial Agent

Abstract:

This study was aimed to synthesize N-phenylpyrazoline derivative and evaluate its antimalarial activity. The pyrazoline was synthesized from chalcone derivative through a cyclo- condensation reaction. Moreover, chalcone derivative was prepared from 4-chlorobenzaldehyde and 4-chloroacetophenone through Claisen-Schmidt condensation. The structure elucidation of the products was performed by FTIR, GC-MS, ¹H- and ¹³C-NMR spectrometers. The antimalarial assay was conducted by inhibition of heme polymerization. The chalcone was obtained as a white solid in 83% yield, while N-phenylpyrazoline derivative was obtained as brown solid in 70% yield. The IC₅₀ values of chalcone and N-phenylpyrazoline derivatives as well as a positive control (chloroquine diphosphate) were 98.66, 20.83, and 3.54 mg/mL, respectively. The results showed that both chalcone and N-phenylpyrazoline derivatives had lower antimalarial activity than the positive control. Molecular docking studies were also performed to explain the mode of action of chalcone and N-phenyl pyrazoline as antimalarial agent.

• Periodical: Materials Science Forum (Volume 1061)
• Pages: 211-216
• DOI: https://doi.org/10.4028/p-wah85x
• Online since: May 2022
• Authors: Robby Noor Cahyono*, Selfira Arum Andari, Tutik Dwi Wahyuningsih
• Keywords: Antimalarial, Chalcone, HPIA Assay, Molecular Docking, N-Phenylpyrazoline

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