Ten derivatives of N1
substituted/unsubstituted 5-(4-chlorophenyl)-3-(2-thienyl) pyrazoline were
synthesised from chalcone-like intermediate and substituted phenyl hydrazines,
hydrazine hydrate,
and semi/thiosemicarbazide. The chemical structure of compounds was confirmed
by means of IR,
1
HNMR, mass spectroscopy, and elemental analysis. The antimicrobial
activities (antibacterial and
antifungal activities) of the synthesized compounds were evaluated against Staphylococcus aureus,
Staphylococcus faecalis, Escherichia coli,
Salmonella typhi, and Candida albicans by agar diffusion
cup plate method. Compound IId
(5-[(4-chlorophenyl)-1-(4-methoxyphenyl)]-3-thiophen-2-yl)-4,5-
dihydro-2-pyrazoline), IIg
(5-(4-chlorophenyl)-1-(2-methylphenyl)-3-(thiophen-2-yl)-4,5-dihydro-2-
pyrazoline) showed very good activity. IIi
(5-(4-chlorophenyl)-1-thiocarbamoyl-3-(thiophen-2-yl))-2-
pyrazoline), IIj
(5-(4-chlorophenyl)-1-carbamoyl-3-(thiophen-2-yl))-2-pyrazoline) exhibit mild
to
moderate inhibitory response against all the tested microbial strains. Compound
IId shows excellent
significant zone of inhibition (mm) against all the species of microbes,
thereby producing promising
antimicrobial respectively.
Author(s) Details
Dr. Biswajit Dash,
Himalayan Pharmacy Institute, Majhitar, Sikkim - 737136, India.
View Book :- http://bp.bookpi.org/index.php/bpi/catalog/book/222
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