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4 results on '"T. Prakasam"'

1. Synthesis of BF₃ catalyzed Mannich derivatives with excellent ee from phenylpropanolamine, study of their antimicrobial activity and molecular docking.

Author

Chennakesava Rao K, Easwaramoorthi K, Arun Y, Balachandran C, Muralidhara Rao KS, Govindhan M, Emi N, Prakasam T, and Perumal PT

Subjects
Anti-Bacterial Agents chemical synthesis, Anti-Bacterial Agents chemistry, Boranes, Catalysis, Dose-Response Relationship, Drug, Microbial Sensitivity Tests, Molecular Structure, Phenylpropanolamine chemical synthesis, Phenylpropanolamine chemistry, Structure-Activity Relationship, Anti-Bacterial Agents pharmacology, Gram-Negative Bacteria drug effects, Gram-Positive Bacteria drug effects, Mannich Bases chemistry, Mannich Bases pharmacology, Molecular Docking Simulation, Phenylpropanolamine pharmacology
Abstract

Antimicrobial agents 4a-g and 5a-g with very good potency were synthesized with 100% ee from phenylpropanolamine (norephedrine) by BF3 catalyzed three components one pot Mannich reaction in good yields. Obtained compounds were characterized using spectral techniques. Antimicrobial study of these compounds revealed a good to very high potential activity against tested microbes when compared to standard antimicrobial drugs streptomycin and ketoconazole. These synthesized compounds exhibited significant minimum inhibitory concentration (MIC) values against Gram positive and Gram negative bacteria. Amongst compound 4b, 4c, 4d, 4e, 5a, and 5e exhibited very high potent MIC values against tested twelve bacteria and three fungi when compared to control. When subjected to molecular docking, in silico studies revealed significant binding energies ranging from -7.06 to -8.90 kcal/mol for all obtained compounds towards target receptor DNA topoisomerase IV and amongst compounds 4b and 4d have shown maximum binding energies 8.70 and 8.90 kcal/mol, respectively., (Copyright © 2015 Elsevier Ltd. All rights reserved.)

Published
2015
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2. Synthesis, antimicrobial and molecular docking studies of enantiomerically pure N-alkylated β-amino alcohols from phenylpropanolamines.

Author

Chennakesava Rao K, Arun Y, Easwaramoorthi K, Balachandran C, Prakasam T, Eswara Yuvaraj T, and Perumal PT

Subjects
Amino Alcohols chemical synthesis, Amino Alcohols chemistry, Anti-Bacterial Agents chemical synthesis, Anti-Bacterial Agents chemistry, Antifungal Agents chemical synthesis, Antifungal Agents chemistry, Bacteria drug effects, Dose-Response Relationship, Drug, Fungi drug effects, Microbial Sensitivity Tests, Molecular Structure, Structure-Activity Relationship, Amino Alcohols pharmacology, Anti-Bacterial Agents pharmacology, Antifungal Agents pharmacology, Molecular Docking Simulation, Phenylpropanolamine chemistry
Abstract

Enantiomerically pure N-alkylated β-amino alcohols 1a, 1a', 1c, 1c', 1d, 1d', 1e and 1e', with ee 100% have been synthesized from phenylpropanolamines 2. Effect of the neighboring chiral environment on the newly formed chiral center has been studied experimentally and concluded that the newly formed chiral center's absolute configuration is opposite to the adjacent (α- or β-) chiral environment. The antimicrobial activity of the synthesized β-amino alcohols were screened using in vitro disc diffusion method and variable antimicrobial activities were shown for 1a, 1a', 1c, 1c', 1d, 1d', 1e &1e' and amongst them 1d &1d' exhibited significant activity against bacteria and fungi. In silico studies revealed all the synthesized β-amino alcohols 1a-e and 1a'-e' have shown good binding energies ranging from -7.38 to -6.09 kJ/mol towards the target receptor DNA topoisomerase IV and 1d' has shown maximum binding energy -7.38 kJ/mol., (Copyright © 2014 Elsevier Ltd. All rights reserved.)

Published
2014
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3. Synthesis, antimicrobial and molecular docking studies of enantiomerically pure N-alkylated β-amino alcohols from phenylpropanolamines

Author

Paramasivam T. Perumal, Chandrasekar Balachandran, K. Easwaramoorthi, K. Chennakesava Rao, T. Prakasam, T. Eswara Yuvaraj, and Y. Arun

Subjects
Antifungal Agents, Stereochemistry, Phenylpropanolamine, Clinical Biochemistry, Binding energy, Pharmaceutical Science, Microbial Sensitivity Tests, Alkylation, Biochemistry, Reductive amination, DNA Topoisomerase IV, Structure-Activity Relationship, Drug Discovery, Molecular Biology, Bacteria, Dose-Response Relationship, Drug, Molecular Structure, biology, Chemistry, Organic Chemistry, Fungi, Absolute configuration, Antimicrobial, biology.organism_classification, Amino Alcohols, In vitro, Anti-Bacterial Agents, Molecular Docking Simulation, Molecular Medicine
Abstract

Enantiomerically pure N-alkylated β-amino alcohols 1a, 1a', 1c, 1c', 1d, 1d', 1e and 1e', with ee 100% have been synthesized from phenylpropanolamines 2. Effect of the neighboring chiral environment on the newly formed chiral center has been studied experimentally and concluded that the newly formed chiral center's absolute configuration is opposite to the adjacent (α- or β-) chiral environment. The antimicrobial activity of the synthesized β-amino alcohols were screened using in vitro disc diffusion method and variable antimicrobial activities were shown for 1a, 1a', 1c, 1c', 1d, 1d', 1e &1e' and amongst them 1d &1d' exhibited significant activity against bacteria and fungi. In silico studies revealed all the synthesized β-amino alcohols 1a-e and 1a'-e' have shown good binding energies ranging from -7.38 to -6.09 kJ/mol towards the target receptor DNA topoisomerase IV and 1d' has shown maximum binding energy -7.38 kJ/mol.

Published
2014

4. Synthesis of BF₃ catalyzed Mannich derivatives with excellent ee from phenylpropanolamine, study of their antimicrobial activity and molecular docking

Author

K, Chennakesava Rao, K, Easwaramoorthi, Y, Arun, C, Balachandran, K S, Muralidhara Rao, M, Govindhan, Nobuhiko, Emi, T, Prakasam, and P T, Perumal

Subjects
Mannich Bases, Molecular Docking Simulation, Structure-Activity Relationship, Dose-Response Relationship, Drug, Molecular Structure, Gram-Negative Bacteria, Phenylpropanolamine, Microbial Sensitivity Tests, Boranes, Gram-Positive Bacteria, Catalysis, Anti-Bacterial Agents
Abstract

Antimicrobial agents 4a-g and 5a-g with very good potency were synthesized with 100% ee from phenylpropanolamine (norephedrine) by BF3 catalyzed three components one pot Mannich reaction in good yields. Obtained compounds were characterized using spectral techniques. Antimicrobial study of these compounds revealed a good to very high potential activity against tested microbes when compared to standard antimicrobial drugs streptomycin and ketoconazole. These synthesized compounds exhibited significant minimum inhibitory concentration (MIC) values against Gram positive and Gram negative bacteria. Amongst compound 4b, 4c, 4d, 4e, 5a, and 5e exhibited very high potent MIC values against tested twelve bacteria and three fungi when compared to control. When subjected to molecular docking, in silico studies revealed significant binding energies ranging from -7.06 to -8.90 kcal/mol for all obtained compounds towards target receptor DNA topoisomerase IV and amongst compounds 4b and 4d have shown maximum binding energies 8.70 and 8.90 kcal/mol, respectively.

Published
2015

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