Prabhakar Chavan (Prabhaker Walmik)

M. Sc., M. Phil., & Ph. D degrees from Gulbrga University, Gulbarga. Presently working as s assistant Professor and PG coordinator, Dept. of PG studies in Chemistry, kuvempu University, Sahyadri Science College, SHIVAMOGGA, karnataka, india

EDUCATION

M. Sc., M. Phil., Ph. D.

RESEARCH, TEACHING, or OTHER INTERESTS

Multidisciplinary, General Chemistry, Organic Chemistry, Spectroscopy

Scopus Publications

Design of an efficient three component one-pot synthesis of -1,2,3,4-tetrahydro-4-oxo-6-(5-substituted 2-phenyl-1H-indol-3-yl)-2-thioxopyrimidine-5-carbonitrile as antimicrobial and antitubercular agent
Indian Journal of Chemistry Ijc, 2022
In the present study, a novel, rapid, improved and eco-friendly synthesis of indolyl-pyrazolo-pyrimidine derivatives 4a-c by using conventional method via one-pot multi-component reaction has been described. The structures of all these unknown compounds have been confirmed with the help of physical and spectroscopic techniques like IR, 1 H and 13 C NMR and mass spectrometry and these newly synthesized compounds have been evaluated for in vitro antimicrobial and antitubercular and antioxidant activities. The results reveal that compound 4a exhibits promising antimicrobial, antitubercular and antioxidant properties when compared to the standard drugs.
Synthesis, optical, photocatalytic and electrochemical properties of cobalt doped ZnS nanoparticles
K.R. Sumadevi, G. Krishnamurthy, H.S. Bhojya Naik, Prabhaker Walmik, Malathesh Pari, N. Ranjitha, R.S. Priya Rani, P. Parameshwara Naik
Asian Journal of Chemistry, 2021
Poly(vinyl pyrrolidone) capped and uncapped Co:ZnS nanoparticles have been synthesized by co-precipitation method. These synthesized nanoparticles were characterized using spectral techniques and the optical and photoluminescence properties of nanoparticles were also studied. Poly(vinyl pyrrolidone) capped nanoparticles has been studied for the electrochemical sensing of various biomolecules. The Co:ZnS modified glassy carbon electrode (GCE) proved to be effective nanoparticles composite electrode to detect biomolecules electrochemically with a wide linear detection range of 0.2 to 1.6 μmol/L, Also a low detection limit (LOD) of 0.06 μM/L and excellent sensitivity of 4.366 μA μM-1 has been obtained. It is observed that the particle size of nanoparticles is affected by the capping agent. It is therefore the modified electrode has become a good electrode material with a greater stability without leaching. The optical band gap was determined by UV-visible spectra and the value is found to be in the range of 3.75 to 4.00 eV. The photocatlytic activity on Eriochrome black T dye in the visible region using nanoparticles has been determined. It was found that the capped nanoparticles are more effective in photocatalytic degradation due to low energy consumption and safe recovery of it after catalytic performance from polluted water.
Synthesis of reduced graphene oxide decorated with Sn/Na doped TiO2 nanocomposite: a photocatalyst for Evans blue dye degradation
K. S. Jithendra Kumara, G. Krishnamurthy, Prabhaker Walmik, Satish Naik, R. S. Priya Rani, Nagargaja Naik
Emergent Materials, 2021
Photocatalytic degradation of Eriochrome black-T and Evan’s blue dyes under the visible light using PVA capped and uncapped Ag doped ZnS nanoparticles
K. R. Sumadevi, G. Krishnamurthy, Prabhaker Walmik, R. S. Priya Rani, Satish Naik, H. S. Bhojya Naik, Nagaraja Naik
Emergent Materials, 2021
Optical and antibacterial evaluation of biofunctionalized Cu:ZnS nanoparticles
G. Arun Kumar, H. S. Bhojya Naik, R. Viswanath, G. Krishnamurthy, Prabhaker Walmik
Emergent Materials, 2020
Synthesis and biological evaluation of novel indolyl-dihydropyridin-3-carboxylate, dihydro[1,2,4]triazol[1,5]pyridin-3-carboxylate and carbohydrazide derivatives
Indian Journal of Chemistry Section B Organic and Medicinal Chemistry, 2020
Design, synthesis of biologically active heterocycles containing Indol- Thiazolyl- Thiazolidinone derivatives
Prabhakar Walmik, Basavaraj S Naraboli, Swathi B, Somashekhar Ghanti
Asian Journal of Pharmaceutical and Clinical Research, 2018
Objective: The present study envisage a novel series of thiazole, indole and thiazolidine derivatives, namely, N-((5-Substituted-2-phenyl-1 H-indol-3-yl)methylene)-4,5,6,7-tetrahydro-5,7,-dimethylbenzo [d]thiazole-2-amine (4a-c), 2-(5-substituted-2-phenyl-1H-indol-3-yl)-3-(4,5,6,7- trimethylbenzo[d]thiazol-2-yl)-thiazolidin-4-one (5a-c) and 5-benzylidine-2-(5-substituted-2phenyl-1H-indol-3yl)-3-(4,5,6,7-tetrahydro-5,5,7- trimethylbenzo[d]thiazol-2-yl) thiazolidin-4-one (6a-c).Methods: All the newly synthesized compounds were characterized by infrared, 1H, 13C nuclear magnetic resonance and mass spectral data and elemental analysis and evaluated for in vitro antimicrobial activity.Results: Novel compounds N-((5-Substituted-2-phenyl-1H-indol-3-yl)methylene)-4,5,6,7-tetrahydro-5,7,-dimethylbenzo [d]thiazole-2-amine (4a-c), 2-(5-substituted-2-phenyl-1H-indol-3-yl)-3-(4,5,6,7-trimethylbenzo[d]thiazol-2-yl)-thiazolidin-4-one (5a-c) and 5-benzylidine-2-(5-substituted- 2phenyl-1H-indol-3yl)-3-(4,5,6,7-tetrahydro-5,5,7-trimethyl benzo[d]thiazol-2-yl)thiazolidin-4-one (6a-c) have been made and characterized using spectral and analytical data. The results of antibacterial and antifungal activities showed that some of the synthesized compounds exhibited promising activities.Conclusion: All the newly synthesized compounds were carried out by the broth microdilution method (NCCLS. 2002) in a DMF concentration of 500, 250, 125, and 62.5 μg/ml. Gentamycin and fluconazole are used as reference standards for antibacterial and antifungal activity, respectively. The final results revealed that compounds 4b, 5b, and 6b exhibited potent antimicrobial activity when compared to the standard drugs.
Synthesis of novel indolyl-thiazolidinone derivatives as antioxidant, antimicrobial and atitubercular agents
Der Pharma Chemica, 2015
Synthesis of novel indolyl-azetidinone and thiazolidinone derivatives as a potent antioxidant, antimicrobial and antitubercular agents
Der Pharma Chemica, 2014
Synthesis of novel N-(aryl) diazenyl thiazol-2-amines and bezylidenethiazolidin- 4-ones linked to indole nucleus as antioxidant, antimicrobial, antimycobacterial and cytotoxic agents
International Journal of Pharmacy and Pharmaceutical Sciences, 2014
Synthesis and biological activities of some new annulated pyrazolopyranopyrimidines and their derivatives containing indole nucleus
Anand R. Saundane, Prabhaker Walmik, Manjunatha Yarlakatti, Vijaykumar Katkar, Vaijinath A. Verma
Journal of Heterocyclic Chemistry, 2014
Synthesis, antimicrobial and antioxidant activities of some new indole derivatives containing pyridopyrimidine and pyrazolopyridine moieties
Anand R. Saundane, Katkar Vijaykumar, A. V. Vaijinath, Prabhaker Walmik
Medicinal Chemistry Research, 2013
Synthesis, antioxidant, antimicrobial, antimycobacterial, and cytotoxic activities of azetidinone and thiazolidinone moieties linked to indole nucleus
A. R. Saundane, Prabhaker Walmik
Journal of Chemistry, 2013
Synthesis, antioxidant and antimicrobial activities of indolyl pyrazoles
Indian Journal of Heterocyclic Chemistry, 2012
Synthesis, antimicrobial and antioxidant activities of some indole analogues containing naphthyridine and pyrimidonaphthyridine systems
Indian Journal of Chemistry Section B Organic and Medicinal Chemistry, 2012
Synthesis, antioxidant and antimicrobial evaluation of thiazolidinone, azetidinone encompassing indolylthienopyrimidines
ANAND RAGHUNATH SAUNDANE, MANJUNATHA YARLAKATTI, PRABHAKER WALMIK, VIJAYKUMAR KATKARf
Journal of Chemical Sciences, 2012
Synthesis and biological activities of some 5-substituted 2-phenyl-3-(6-aryl-3-cyano-2-substituted pyridin-4-yl) indoles
Indian Journal of Heterocyclic Chemistry, 2011
Synthesis and antimicrobial activities of 5(2' S'-disubstitutedih- Indol-3'-yl)-5h-thiazolo [4,3-b]1,3,4-oxadiazole, -1,3,4-thiadiazole, -1,2,4triazole and their derivatives
Heterocyclic Communications, 2009