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SYNTHESIS CHARACTERIZATION OFNOVEL SERIES OF PYRROLYL PYRANOPYRAZOLE AS ANTIMICROBIAL AGENTS

Authors: Tabasum Killedar, Shweta Medleri, Channabasappa S. Hallikeri*, Shrinivas D. Joshi;

SYNTHESIS CHARACTERIZATION OFNOVEL SERIES OF PYRROLYL PYRANOPYRAZOLE AS ANTIMICROBIAL AGENTS

Abstract

New series of pyrrolylpyranopyrazole were synthesized by reacting with (one pot synthesis) ethyl acetoacetate in aqueous ethanol (1), hydrazine hydrate (2), substituted aldehydes (3a-g), malononitrile (4) and triethylamine’s base stirring for 5hr the solid precipitate was obtained, it has been filtered and washed with cold water to give 6-amino-3-methyl-4-substituted phenyl-1,3a,4,7a-tetrahydropyrano [2,3-c] pyrazole-5-carbonitrile (5a-g). Further it is reacted with 4- pyrrol-1-yl benzoic acid (6) with substituted pyranopyrazoline presence of HBTU and DIEA which resulting in formation of substituted N-5-cyano-3-methyl-4-substituted phenyl 1,3a,47a-tetrahydropyrano [2,3-c] pyrazol-6-yl)-4-(1H-pyrrol-1-yl) benzamides (7a-g) was obtained. All newly synthesized compounds were confirmed by TLC and melting point. The structure of the all newly synthesized compounds were confirmed by spectral study such as IR, 1H NMR, 13C NMR and Mass spectroscopy. The newly synthesized compounds were screened for their antibacterial and antitubercular activities. Compounds exhibited antitubercular activity in the range of 1.6 to 25 µg/ml (MIC). Compounds showed antibacterial activity in the range of 0.8 to 100 µg/ml (MIC). It was indeed very much encouraging to note that most of the compounds have shown better and significant antibacterial and antitubercular activities.

Keywords

Antitubercular, Antibacterial, Pyrrolylpyranopyrazole. HBTU, DIEA., Antitubercular, Antibacterial, Pyrrolylpyranopyrazole. HBTU, DIEA.

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This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
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impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
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