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10 results on '"Siva S. Panda"'

1. Efficient Synthesis of Pyrazinoic Acid Hybrid Conjugates

Author

Siva S. Panda, Abdullah M. Asiri, Mohamed Elagawany, Devan D. Buchanan, Behrad Torkian, Keerthana Bathala, Sean J. Thomas, Jason E. Capito, Muhammad N. Arshad, and Abeer N. Al-Romaizan

Subjects
pyrazinamide, pyrazinoic acid, secondary amines, amino acids, benzotriazole methodology, antituberculosis, Chemistry, QD1-999
Abstract

Abstract Benzotriazole-activated pyrazinoic acid was utilized as a versatile building block for the efficient and convenient synthesis of novel hybrid conjugates of pyrazinoic acid with secondary amines via amino acid linkers in high yields.

Published
2017
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2. Efficient Synthesis of Pyrazinoic Acid Hybrid Conjugates

Author

Keerthana Bathala, Behrad Torkian, Mohamed Elagawany, Devan D. Buchanan, Muhammad Nadeem Arshad, Abeer N. Al-Romaizan, Siva S. Panda, Jason E. Capito, Abdullah M. Asiri, and Sean J. Thomas

Subjects
chemistry.chemical_classification, amino acids, pyrazinamide, benzotriazole methodology, Chemistry, Materials Science (miscellaneous), Organic Chemistry, Pyrazinamide, Combinatorial chemistry, Catalysis, Amino acid, lcsh:Chemistry, Biomaterials, chemistry.chemical_compound, pyrazinoic acid, Pyrazinoic acid, secondary amines, lcsh:QD1-999, Block (telecommunications), medicine, antituberculosis, Conjugate, medicine.drug
Abstract

Benzotriazole-activated pyrazinoic acid was utilized as a versatile building block for the efficient and convenient synthesis of novel hybrid conjugates of pyrazinoic acid with secondary amines via amino acid linkers in high yields.

Published
2017

3. Diastereoselective Synthesis of Methanopyridoxazocinones

Author

Abdullah M. Asiri, C. Dennis Hall, Oleksandr S. Detistov, Peter J. Steel, Siva S. Panda, and Alan R. Katritzky

Subjects
Chemistry, Oxazocines, Organic Chemistry, Diastereomer, Chirality (chemistry), Medicinal chemistry
Abstract

Two approaches to the synthesis of oxygen-bridged tetrahydropyridones have been developed. In the first approach, substituted pyrido[4,3-g][1,3]oxazocines derivatives were prepared by diastereoselective one-pot reactions of substituted 7-azacoumarins with enolizable ketones and non-bulky primary amines. In the second one, 3-amido-7-azacoumarins were reacted with enolizable ketones in the presence of a base to form diastereomerically pure pyrido[4,3-g][1,3]oxazocines.

Published
2014

4. Fluorescent-Labeled Amino Acid–Antibiotic Conjugates

Author

Alan R. Katritzky, C. Dennis Hall, Anand D. Tiwari, Abdullah M. Asiri, and Siva S. Panda

Subjects
chemistry.chemical_classification, Stereochemistry, medicine.drug_class, Chemistry, Organic Chemistry, Antibiotics, medicine, Chirality (chemistry), Fluorescence, Catalysis, Amino acid, Conjugate
Abstract

Benzotriazole-mediated synthesis provides novel fluorescent-labeled amino acid–quinolone antibiotic conjugates in good yields with retention of chirality. The photophysical properties of all the fluorescent-labeled antibiotic conjugates were determined.

Published
2014

5. Microwave-Assisted Synthesis of Biotin Conjugates with Quinolone Antibiotics via Amino Acids

Author

Alan R. Katritzky, Abdullah M. Asiri, Siva S. Panda, and Roman N. Naumov

Subjects
chemistry.chemical_classification, medicine.drug_class, Organic Chemistry, Antibiotics, Quinolone, Microwave assisted, Catalysis, Amino acid, chemistry.chemical_compound, Biotin, chemistry, Microwave irradiation, medicine, Organic chemistry, Chirality (chemistry), Conjugate
Abstract

Benzotriazole-activated biotin was utilized as a versatile building block for the efficient and convenient synthesis of novel biotin conjugates with quinolone antibiotics via amino acid linkers under microwave irradiation. The products are obtained in yields of 70–91% with retention of chirality.

Published
2014

6. Solution-Phase Synthesis of Chiral N-, O-, and S-Acyl Isopeptides

Author

Sumaira Liaqat, Alan R. Katritzky, Abdul Rauf, Abdulrahman O. Al-Youbi, and Siva S. Panda

Subjects
chemistry.chemical_classification, Benzotriazole, Stereochemistry, Chemistry, Organic Chemistry, Tryptophan, Tripeptide, Catalysis, Amino acid, chemistry.chemical_compound, Tyrosine, Chirality (chemistry), Solution phase synthesis, Cysteine
Abstract

A convenient synthesis of chiral N-, O-, and S-acyl monoiso- and diisopeptides from di- and tripeptides containing tryptophan, tyrosine, and cysteine units using benzotriazole is reported in solution phase.

Published
2013

7. NSAID Conjugates with Carnosine and Amino Acids

Author

Abdullah M. Asiri, Sandhyamayee Sahu, Alan R. Katritzky, and Siva S. Panda

Subjects
Drug, chemistry.chemical_classification, Nonsteroidal, media_common.quotation_subject, Organic Chemistry, Carnosine, Prodrug, Catalysis, Amino acid, chemistry.chemical_compound, chemistry, Biochemistry, media_common, Conjugate
Abstract

Benzotriazole-mediated syntheses of novel bioconjugates of nonsteroidal anti-inflammatory drugs with carnosine and with amino acids were prepared in yields of 50–97% as potential drug candidates.

Published
2013

8. Green, Catalyst-Free Synthesis of Mesalazine Conjugates

Author

Alan R. Katritzky, Siva S. Panda, Mohamed A. Ibrahim, and Khalid A. Alamry

Subjects
Green chemistry, chemistry.chemical_compound, Mesalazine, chemistry, Organic Chemistry, Microwave irradiation, Prodrug, Combinatorial chemistry, Catalysis, Conjugate
Abstract

A greener protocol for the synthesis of mesalazine conjugates is reported. Mesalazine conjugates are prepared in high yields by a one-pot reaction of mesalazine and aminoacyl/peptidoylbenzotriazoles in water under microwave irradiation.

Published
2013

9. Peptidoyl Benzotriazolide-Mediated Acylation of Nitrile-Activated Methylene Groups

Author

Sandhyamayee Sahu, Alan R. Katritzky, Iryna O. Lebedyeva, and Siva S. Panda

Subjects
Acylation, chemistry.chemical_compound, Nitrile, Chemistry, Organic Chemistry, Organic chemistry, lipids (amino acids, peptides, and proteins), Tripeptide, Methylene, Chirality (chemistry), Catalysis
Abstract

Peptidoyl benzotriazoles permit the acylation of active methylene groups of nitriles to provide CH-acylated nitrile enols from α-amino acids or from di- or tripeptides with no loss of chirality.

Published
2013

10. Macrocyclic Peptoids by Selective S-Acylation of Cysteine Esters

Author

Mohamed A. Ibrahim, Linda Nhon, Ahmed Hamed, Siva S. Panda, Alan R. Katritzky, and Said A. El-Feky

Subjects
chemistry.chemical_classification, chemistry.chemical_compound, Benzotriazole, chemistry, Organic Chemistry, S-acylation, Organic chemistry, lipids (amino acids, peptides, and proteins), Catalysis, Amino acid, Cysteine
Abstract

Optimized selective S-acylations of cysteine esters gave intermediates for the synthesis of macrocyclic peptoids by a benzotriazole-based method.

Published
2013

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