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Jana K, Pramanik U, Ingle KS, Maity R, Mukherjee S, Nayak SK, Chandra Debnath S, Maity T, Maity S, Chandra Samanta B. Copper(II) complexes with NNN and NNO Schiff base ligands as efficient photodegradation agents for methylene blue, preferential BSA binder and biomaterial transplants. J Photochem Photobiol A Chem 2022. [DOI: 10.1016/j.jphotochem.2021.113565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Mašulović AD, Lađarević JM, Radovanović LD, Vitnik ŽJ, Vitnik VD, Rogan JR, Mijin DŽ. Charge assisted assembly of zwitterionic pyridone hydrates. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Venugopala KN, Deb PK, Pillay M, Chopra D, Chandrashekharappa S, Morsy MA, Aldhubiab BE, Attimarad M, Nair AB, Sreeharsha N, Kandeel M, Venugopala R, Mohanlall V. 4-Aryl-1,4-Dihydropyridines as Potential Enoyl-Acyl Carrier Protein Reductase Inhibitors: Antitubercular Activity and Molecular Docking Study. Curr Top Med Chem 2021; 21:295-306. [PMID: 33138763 DOI: 10.2174/1568026620666201102121606] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 09/16/2020] [Accepted: 10/05/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND Tuberculosis remains one of the most deadly infectious diseases worldwide due to the emergence of multi-drug resistance (MDR) and extensively drug resistance (XDR) strains of Mycobacterium tuberculosis (MTB). AIMS Currently, available drugs are getting resistant and toxic. Hence, there is an urgent need for the development of potent molecules to treat tuberculosis. MATERIALS AND METHODS Herein, the screening of a total of eight symmetrical 1,4-dihydropyridine (1,4- DHP) derivatives (4a-4h) was carried out for whole-cell anti-TB activity against the susceptible H37Rv and MDR strains of MTB. RESULTS AND DISCUSSION Most of the compounds exhibited moderate to excellent activity against the susceptible H37Rv. Moreover, the most promising compound 4f (against H37Rv) having paratrifluoromethyl phenyl group at 4-position and bis para-methoxy benzyl ester group at 3- and 5- positions of 1,4-dihydropyridine pharmacophore, exhibited no toxicity, but demonstrated weak activity against MTB strains resistant to isoniazid and rifampicin. In light of the inhibitory profile of the title compounds, enoyl-acyl carrier protein reductase (InhA) appeared to be the appropriate molecular target. A docking study of these derivatives against InhA receptor revealed favorable binding interactions. Further, in silico predicted ADME properties of these compounds 4a-4h were found to be in the acceptable ranges, including satisfactory Lipinski's rule of five, thereby indicating their potential as drug-like molecules. CONCLUSION In particular, the 1,4-DHP derivative 4f can be considered an attractive lead molecule for further exploration and development of more potent anti-TB agents as InhA inhibitors.
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Affiliation(s)
- Katharigatta N Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Pran Kishore Deb
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Philadelphia University, Amman 19392, Jordan
| | - Melendhran Pillay
- Department of Microbiology, National Health Laboratory Services, KZN Academic Complex, Inkosi Albert Luthuli Central Hospital, Durban 4001, South Africa
| | - Deepak Chopra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
| | | | - Mohamed A Morsy
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia 61511, Egypt
| | - Bandar E Aldhubiab
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Mahesh Attimarad
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Anroop B Nair
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Nagaraja Sreeharsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Mahmoud Kandeel
- Department of Biomedical Sciences, College of Veterinary Medicine, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Rashmi Venugopala
- Department of Public Health Medicine, University of KwaZulu-Natal, Howard College Campus, Durban 4001, South Africa
| | - Viresh Mohanlall
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban 4001, South Africa
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Venugopala KN, Chandrashekharappa S, Tratrat C, Deb PK, Nagdeve RD, Nayak SK, Morsy MA, Borah P, Mahomoodally FM, Mailavaram RP, Attimarad M, Aldhubiab BE, Sreeharsha N, Nair AB, Alwassil OI, Haroun M, Mohanlall V, Shinu P, Venugopala R, Kandeel M, Nandeshwarappa BP, Ibrahim YF. Crystallography, Molecular Modeling, and COX-2 Inhibition Studies on Indolizine Derivatives. Molecules 2021; 26:molecules26123550. [PMID: 34200764 PMCID: PMC8230391 DOI: 10.3390/molecules26123550] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 06/02/2021] [Accepted: 06/08/2021] [Indexed: 11/16/2022] Open
Abstract
The cyclooxygenase-2 (COX-2) enzyme is an important target for drug discovery and development of novel anti-inflammatory agents. Selective COX-2 inhibitors have the advantage of reduced side-effects, which result from COX-1 inhibition that is usually observed with nonselective COX inhibitors. In this study, the design and synthesis of a new series of 7-methoxy indolizines as bioisostere indomethacin analogues (5a-e) were carried out and evaluated for COX-2 enzyme inhibition. All the compounds showed activity in micromolar ranges, and the compound diethyl 3-(4-cyanobenzoyl)-7-methoxyindolizine-1,2-dicarboxylate (5a) emerged as a promising COX-2 inhibitor with an IC50 of 5.84 µM, as compared to indomethacin (IC50 = 6.84 µM). The molecular modeling study of indolizines indicated that hydrophobic interactions were the major contribution to COX-2 inhibition. The title compound diethyl 3-(4-bromobenzoyl)-7-methoxyindolizine-1,2-dicarboxylate (5c) was subjected for single-crystal X-ray studies, Hirshfeld surface analysis, and energy framework calculations. The X-ray diffraction analysis showed that the molecule (5c) crystallizes in the monoclinic crystal system with space group P 21/n with a = 12.0497(6)Å, b = 17.8324(10)Å, c = 19.6052(11)Å, α = 90.000°, β = 100.372(1)°, γ = 90.000°, and V = 4143.8(4)Å3. In addition, with the help of Crystal Explorer software program using the B3LYP/6-31G(d, p) basis set, the theoretical calculation of the interaction and graphical representation of energy value was measured in the form of the energy framework in terms of coulombic, dispersion, and total energy.
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Affiliation(s)
- Katharigatta N. Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban 4001, South Africa;
- Correspondence: (K.N.V.); (S.C.); Tel.: +966-1358-98842 (K.N.V.); +91-94486-39413 (S.C.)
| | - Sandeep Chandrashekharappa
- Department of Medicinal Chemistry, National Institute of Pharmaceutical Education and Research (NIPER-R) Raebareli, Lucknow UP 226002, India
- Institute for Stem Cell Science and Regenerative Medicine, NCBS, TIFR, GKVK, Bellary Road, Bangalore 560065, India
- Correspondence: (K.N.V.); (S.C.); Tel.: +966-1358-98842 (K.N.V.); +91-94486-39413 (S.C.)
| | - Christophe Tratrat
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
| | - Pran Kishore Deb
- Faculty of Pharmacy, Philadelphia University, Amman 19392, Jordan;
| | - Rahul D. Nagdeve
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur 440010, Maharashtra, India; (R.D.N.); (S.K.N.)
| | - Susanta K. Nayak
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur 440010, Maharashtra, India; (R.D.N.); (S.K.N.)
| | - Mohamed A. Morsy
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia 61511, Egypt;
| | - Pobitra Borah
- Pratiksha Institute of Pharmaceutical Sciences, Chandrapur Road, Panikhaiti, Guwahati 781026, Assam, India;
| | - Fawzi M. Mahomoodally
- Department of Health Sciences, Faculty of Medicine and Health Sciences, University of Mauritius, Réduit 80835, Mauritius;
| | - Raghu Prasad Mailavaram
- Department of Pharmaceutical Chemistry, Shri Vishnu College of Pharmacy, Vishnupur, Bhimavaram 534202, India;
| | - Mahesh Attimarad
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
| | - Bandar E. Aldhubiab
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
| | - Nagaraja Sreeharsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
- Department of Pharmaceutics, Vidya Siri College of Pharmacy, Off Sarjapura Road, Bangalore 560035, India
| | - Anroop B. Nair
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
| | - Osama I. Alwassil
- Department of Pharmaceutical Sciences, College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, Riyadh 11481, Saudi Arabia;
| | - Michelyne Haroun
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (C.T.); (M.A.M.); (M.A.); (B.E.A.); (N.S.); (A.B.N.); (M.H.)
| | - Viresh Mohanlall
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban 4001, South Africa;
| | - Pottathil Shinu
- Department of Biomedical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia;
| | - Rashmi Venugopala
- Department of Public Health Medicine, Howard College Campus, University of KwaZulu-Natal, Durban 4001, South Africa;
| | - Mahmoud Kandeel
- Department of Biomedical Sciences, College of Veterinary Medicine, King Faisal University, Al-Ahsa 31982, Saudi Arabia;
- Department of Pharmacology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh 33516, Egypt
| | - Belakatte P. Nandeshwarappa
- Department of Studies in Chemistry, Shivagangotri, Davangere University, Davangere, Karnataka 577007, India;
| | - Yasmine F. Ibrahim
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia 61511, Egypt;
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Mahesha, Hema MK, Karthik CS, Pampa KJ, Mallu P, Lokanath NK. Solvent induced mononuclear and dinuclear mixed ligand Cu( ii) complex: structural diversity, supramolecular packing polymorphism and molecular docking studies. NEW J CHEM 2020. [DOI: 10.1039/d0nj03567j] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Phenolate bridged dinuclear and solvent induced mononuclear supramolecular isomers of Cu(ii) complex have been reported to explore the structural diversity and their antibacterial activity supported by molecular docking studies.
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Affiliation(s)
- Mahesha
- Department of Studies in Physics
- University of Mysore
- Mysuru-570 006
- India
| | - M. K. Hema
- Department of Studies in Physics
- University of Mysore
- Mysuru-570 006
- India
| | - C. S. Karthik
- Department of Chemistry
- SJCE
- JSS Science and Technology University
- Mysuru-570 006
- India
| | - K. J. Pampa
- Department of Biotechnology
- University of Mysore
- Mysuru-570 006
- India
| | - P. Mallu
- Department of Chemistry
- SJCE
- JSS Science and Technology University
- Mysuru-570 006
- India
| | - N. K. Lokanath
- Department of Studies in Physics
- University of Mysore
- Mysuru-570 006
- India
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Intermolecular Interactions in Ionic Crystals of Nucleobase Chlorides—Combining Topological Analysis of Electron Densities with Energies of Electrostatic Interactions. CRYSTALS 2019. [DOI: 10.3390/cryst9120668] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Understanding intermolecular interactions in crystals of molecular ions continues to be difficult. On the one hand, the analysis of interactions from the point of view of formal charges of molecules, similarly as it is commonly done for inorganic ionic crystals, should be performed. On the other hand, when various functional groups are present in the crystal, it becomes natural to look at the interactions from the point of view of hydrogen bonding, π…π stacking and many other kinds of non-covalent atom–atom bonding. Often, these two approaches seem to lead to conflicting conclusions. On the basis of experimental charge densities of cytosinium chloride, adeninium chloride hemihydrate, and guanine dichloride crystals, with the help of theoretical simulations, we have deeply analysed intermolecular interactions among protonated nucleobases, chloride anions and water molecules. Here, in the second paper of the series of the two (Kumar et al., 2018, IUCrJ 5, 449–469), we focus on applying the above two approaches to the large set of dimers identified in analysed crystals. To understand electrostatic interactions, we analysed electrostatic interaction energies (Ees) computed directly from molecular charge densities and contrasted them with energies computed only from net molecular charges, or from a sum of electric multipolar moments, to find the charge penetration contribution to Ees. To characterize non-covalent interactions we performed topological analyses of crystal electron densities and estimated their interaction energies (EEML) from properties of intermolecular bond critical points. We show that the overall crystal architecture of the studied compounds is governed by the tight packing principle and strong electrostatic attractions and repulsions between ions. Many ions are oriented to each other in a way to strengthen attractive electrostatic interactions or weaken strong repulsion, but not all of them. Numerous bond critical points and bond paths were found between ions, including nucleobase cations despite their overall repulsive interactions. It is clear there is no correlation between EEML and Ees. However, strong relation between EEML and the charge penetration component of Ees is observed. The relation holds regardless of interaction types or whether or not interacting molecules bear the same or opposite charges. Thus, a charge density-based approach for computing intermolecular interaction energies and the atom–atom approach to analyse non-covalent interactions do complement each other, even in ionic systems.
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Venugopala KN, Chandrashekharappa S, Pillay M, Bhandary S, Kandeel M, Mahomoodally FM, Morsy MA, Chopra D, Aldhubiab BE, Attimarad M, Alwassil OI, Harsha S, Mlisana K, Odhav B. Synthesis and Structural Elucidation of Novel Benzothiazole Derivatives as Anti-tubercular Agents: In-silico Screening for Possible Target Identification. Med Chem 2019; 15:311-326. [PMID: 29968540 DOI: 10.2174/1573406414666180703121815] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 05/14/2018] [Accepted: 06/13/2018] [Indexed: 11/22/2022]
Abstract
BACKGROUND Benzothiazole derivatives are known for anti-TB properties. Based on the known anti-TB benzothiazole pharmacophore, in the present study, we described the synthesis, structural elucidation, and anti-tubercular screening of a series of novel benzothiazole (BNTZ) derivatives (BNTZ 1-7 and BNTZ 8-13). OBJECTIVE The study aims to carry out the development of benzothiazole based anti-TB compounds. METHODS Title compounds are synthesized by microwave method and purified by column chromatography. Characterization of the compounds is achieved by FT-IR, NMR (1H and 13C), LCMS and elemental analysis. Screening of test compounds for anti-TB activity is achieved by Resazurin Microplate Assay (REMA) Plate method. RESULTS It was noted that the BNTZ compound with an isoquinoline nucleus (BNTZ 9) exhibited remarkable anti-tubercular activity at 8 µg/mL against both the susceptible strain H37Rv and the multi-drug resistant tuberculosis strains of Mycobacterium tuberculosis. On the other hand, the BNTZ compound with a naphthalene nucleus (BNTZ 2) revealed anti-tubercular activity at 6 µg/mL and 11 µg/mL against both the susceptible strain H37Rv and the multi-drug resistant tuberculosis strains of M. tuberculosis, respectively. One of the selected BNTZ derivatives BNTZ 13 was used for single crystal X-ray studies. CONCLUSION To identify the appropriate target for potent BNTZ compounds from the series, molecular modeling studies revealed the multiple strong binding of several BNTZs with mycobacterium lysine-ɛ-aminotransferase and decaprenyl-phosphoryl-β-D-ribose 2'-oxidase. The interaction is derived by forming favorable hydrogen bonds and stacking interactions. This new class of BNTZ compounds gave promising anti-tubercular actions in the low micromolar range, and can be further optimized on a structural basis to develop promising, novel, BNTZ pharmacophore-based anti-tubercular drugs.
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Affiliation(s)
- Katharigatta N Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia.,Department of Biotechnology and Food Technology, Durban University of Technology, Durban 4001, South Africa
| | - Sandeep Chandrashekharappa
- Institute for Stem Cell Biology and Regenerative Medicine, NCBS, TIFR, GKVK, Bellary Road, Bangalore 560 065, India
| | - Melendhran Pillay
- Department of Microbiology, National Health Laboratory Services, KZN Academic Complex, Inkosi Albert Luthuli Central Hospital, Durban 4001, South Africa
| | - Subhrajyoti Bhandary
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
| | - Mahmoud Kandeel
- Department of Pharmacology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafrelsheikh 33511, Egypt
| | - Fawzi M Mahomoodally
- Department of Health Sciences, Faculty of Science, University of Mauritius, Reduit, Mauritius
| | - Mohamed A Morsy
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia.,Department of Pharmacology, Faculty of Medicine, Minia University, 61511 El-Minia, Egypt
| | - Deepak Chopra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal By-pass Road, Bhauri, Bhopal 462 066, Madhya Pradesh, India
| | - Bandar E Aldhubiab
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Mahesh Attimarad
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Osama I Alwassil
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia.,Department of Pharmaceutical Sciences, College of Pharmacy, King Saud bin Abdulaziz University for Health Sciences, 3163, P.O. Box 3660, Riyadh, 11481, Saudi Arabia
| | - Sree Harsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia
| | - Koleka Mlisana
- Department of Microbiology, National Health Laboratory Services, KZN Academic Complex, Inkosi Albert Luthuli Central Hospital, Durban 4001, South Africa
| | - Bharti Odhav
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban 4001, South Africa
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Venugopala KN, Khedr MA, Pillay M, Nayak SK, Chandrashekharappa S, Aldhubiab BE, Harsha S, Attimard M, Odhav B. Benzothiazole analogs as potential anti-TB agents: computational input and molecular dynamics. J Biomol Struct Dyn 2018; 37:1830-1842. [PMID: 29697293 DOI: 10.1080/07391102.2018.1470035] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Biotin is very important for the survival of Mycobacterium tuberculosis. 7,8-Diamino pelargonic acid aminotransaminase (DAPA) is a transaminase enzyme involved in the biosynthesis of biotin. The benzothiazole title compounds were investigated for their in vitro anti-tubercular activity against two tubercular strains: H37Rv (ATCC 25,177) and MDR-MTB (multidrug-resistant M. tuberculosis, resistant to isoniazid, rifampicin, and ethambutol) by an agar incorporation method. The possible binding mode and predicted affinity were computed using a molecular docking study. Among the synthesized compounds in the series, the title compound {2-(benzo[d]thiazol-2-yl-methoxy)-5-fluorophenyl}-(4-chlorophenyl)-methanone was found to exhibit significant activity with minimum inhibitory concentrations of 1 μg/mL and 2 μg/mL against H37Rv and MDR-MTB, respectively; this compound showed the highest binding affinity (-24.75 kcal/mol) as well.
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Affiliation(s)
- Katharigatta N Venugopala
- a Department of Pharmaceutical Sciences, College of Clinical Pharmacy , King Faisal University , Al-Ahsa , 31982 , Kingdom of Saudi Arabia.,b Department of Biotechnology and Food Technology , Durban University of Technology , Durban , 4001 , South Africa
| | - Mohammed A Khedr
- a Department of Pharmaceutical Sciences, College of Clinical Pharmacy , King Faisal University , Al-Ahsa , 31982 , Kingdom of Saudi Arabia.,c Faculty of Pharmacy, Department of Pharmaceutical Chemistry , Helwan University , Ein Helwan, Cairo , 11795 , Egypt
| | - Melendhran Pillay
- d Department of Microbiology , National Health Laboratory Services, KZN Academic Complex, Inkosi Albert Luthuli Central Hospital , Durban , 4001 , South Africa
| | - Susanta K Nayak
- e Department of Chemistry , Visvesvaraya National Institute of Technology , Nagpur , Maharashtra , 440010 , India
| | - Sandeep Chandrashekharappa
- f Institute for Stem Cell Biology and Regenerative Medicine , NCBS, TIFR, GKVK, Bellary Road, Bangalore , 560 065 , India
| | - Bandar E Aldhubiab
- a Department of Pharmaceutical Sciences, College of Clinical Pharmacy , King Faisal University , Al-Ahsa , 31982 , Kingdom of Saudi Arabia
| | - Sree Harsha
- a Department of Pharmaceutical Sciences, College of Clinical Pharmacy , King Faisal University , Al-Ahsa , 31982 , Kingdom of Saudi Arabia
| | - Mahesh Attimard
- a Department of Pharmaceutical Sciences, College of Clinical Pharmacy , King Faisal University , Al-Ahsa , 31982 , Kingdom of Saudi Arabia
| | - Bharti Odhav
- b Department of Biotechnology and Food Technology , Durban University of Technology , Durban , 4001 , South Africa
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One-pot microwave assisted synthesis and structural elucidation of novel ethyl 3-substituted-7-methylindolizine-1-carboxylates with larvicidal activity against Anopheles arabiensis. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2017.11.131] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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Chandrashekharappa S, Venugopala KN, Tratrat C, Mahomoodally FM, Aldhubiab BE, Haroun M, Venugopala R, Mohan MK, Kulkarni RS, Attimarad MV, Harsha S, Odhav B. Efficient synthesis and characterization of novel indolizines: exploration of in vitro COX-2 inhibitory activity and molecular modelling studies. NEW J CHEM 2018. [DOI: 10.1039/c7nj05010k] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Novel indolizine scaffolds as COX-2 inhibiting agents.
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Chia TS, Quah CK. Temperature-induced order-disorder structural phase transitions of two-dimensional isostructural hexamethylenetetramine co-crystals. ACTA CRYSTALLOGRAPHICA SECTION B, STRUCTURAL SCIENCE, CRYSTAL ENGINEERING AND MATERIALS 2017; 73:879-890. [PMID: 28980993 DOI: 10.1107/s2052520617009520] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 06/26/2017] [Indexed: 06/07/2023]
Abstract
Hexamethylenetetramine-benzoic acid (1/2) (HBA) and hexamethylenetetramine-4-methylbenzoic acid (1/2) (HMBA) co-crystals undergo order-disorder structural phase transition from a low-temperature monoclinic crystal structure to a high-temperature orthorhombic crystal structure at the transition temperatures of 257.5 (5) K (Pn ↔ Fmm2) and 265.5 (5) K (P21/n ↔ Cmcm), respectively, using variable-temperature single-crystal X-ray diffraction analysis. The observed phase transitions were confirmed to be reversible first-order transitions as indicated by the sharp endothermic and exothermic peaks in the differential scanning calorimetry measurement. The three-molecule aggregate of HBA and HMBA consists of a hexamethylenetetramine molecule and two benzoic acid or two 4-methylbenzoic acid molecules, respectively. The acid molecules are ordered at the low-temperature phase and are equally disordered over two positions, which are related by a mirror symmetry, at the high-temperature phase. The two-dimensional supramolecular constructs common to both co-crystals are formed by three-molecule aggregates via weak intermolecular C-H...O and C-H...π interactions into molecular trilayers parallel to the ac plane with small XPac dissimilarity indices and parameters. The PIXEL interaction energies of all corresponding molecular contacts were calculated and the results are comparable between HBA and HMBA co-crystals, resulting in similar lattice energies and transition temperatures despite their two-dimensional isostructural relationship. The observed phase transitions of these two energetically similar co-crystals are triggered by similar mechanisms, i.e. the molecular rotator ordering and structural order-disorder transformation, which induced non-merohedral twinning with similar twin matrices in the low-temperature crystal form of both co-crystals.
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Affiliation(s)
- Tze Shyang Chia
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Ching Kheng Quah
- X-ray Crystallography Unit, School of Physics, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
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12
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Dharma Rao BD, Bhandary S, Chopra D, Venugopala KN, Gleiser RM, Kasumbwe K, Odhav B. Synthesis and characterization of a novel series of 1,4-dihydropyridine analogues for larvicidal activity against Anopheles arabiensis. Chem Biol Drug Des 2017; 90:397-405. [PMID: 28135765 DOI: 10.1111/cbdd.12957] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 12/14/2016] [Accepted: 01/20/2017] [Indexed: 11/30/2022]
Abstract
The new-fangled bis(4-substituted benzyl) 4-(4-substitued phenyl)-2,6-dimethyl-1,4-dihydropyridine-3,5-dicarboxylate derivatives were synthesized by the union of substituted aryl aldehyde, tert-butyl acetoacetate, ammonium carbonate with 4-substituted benzyl alcohol via Hantzsch ester synthesis in aqueous medium under catalyst-free conditions. The newly synthesized compounds were characterized by spectroscopic techniques such as IR, NMR (1 H and 13 C), ESI mass, elemental analysis, and single-crystal X-ray diffraction. The characterized title compounds were evaluated for the larvicidal activity against Anopheles arabiensis by standard WHO larvicidal assay method using Temephos as standard at 4 μg/ml. The title compounds bis(4-methoxybenzyl) 2,6-dimethyl-4-(4-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate and bis(4-chlorobenzyl) 2,6-dimethyl-4-(4-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylate exhibited promising larvicidal activity at 65.6% and 72.2%, respectively, when compared with the standard compound at 98.9%.
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Affiliation(s)
- Bhaskara D Dharma Rao
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Subhrajyoti Bhandary
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Deepak Chopra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, Madhya Pradesh, India
| | - Katharigatta N Venugopala
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - Raquel M Gleiser
- IMBIV, CREAN (CONICET-UNC), Av. Valparaíso s.n., and FCEFyN, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Kabange Kasumbwe
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - Bharti Odhav
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
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13
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Sandeep C, Venugopala KN, Gleiser RM, Chetram A, Padmashali B, Kulkarni RS, Venugopala R, Odhav B. Greener synthesis of indolizine analogues using water as a base and solvent: study for larvicidal activity against Anopheles arabiensis. Chem Biol Drug Des 2016; 88:899-904. [PMID: 27440719 DOI: 10.1111/cbdd.12823] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 05/19/2016] [Accepted: 07/06/2016] [Indexed: 11/29/2022]
Abstract
Greener synthesis of a series of novel indolizine analogues have been achieved by the cyclization of aromatic cycloimmonium ylides with electron-deficient alkynes in the presence of water as the base and solvent at 80 °C. Yield of the title compounds was good and reactions performed were eco-friendly. The structures of these newly synthesized compounds have been confirmed by spectroscopic techniques such as FTIR, NMR, LC-MS, and elemental analysis. Characterized title compounds were evaluated for larvicidal activity against Anopheles arabiensis by standard WHO larvicidal assay using Temefos as standard at 4 μg/mL. Title compounds 2e, 2f, and 2g emerged as promising larvicidal agents.
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Affiliation(s)
| | - Katharigatta N Venugopala
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa.
| | - Raquel M Gleiser
- CREAN-IMBIV (CONICET-UNC), Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Abeen Chetram
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - Basavaraj Padmashali
- Department of Chemistry, Sahyadri Science College (Autonomous), Shimoga, India. .,Department of Studies and Research in Chemistry, School of Basic Sciences, Rani Channamma University, Belagavi, Karnataka, India.
| | | | - Rashmi Venugopala
- Department of Public Health Medicine, University of KwaZulu-Natal, Howard College Campus, Durban, South Africa
| | - Bharti Odhav
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
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14
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Venugopala KN, Dharma Rao GB, Bhandary S, Pillay M, Chopra D, Aldhubiab BE, Attimarad M, Alwassil OI, Harsha S, Mlisana K. Design, synthesis, and characterization of (1-(4-aryl)- 1H-1,2,3-triazol-4-yl)methyl, substituted phenyl-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylates against Mycobacterium tuberculosis. DRUG DESIGN DEVELOPMENT AND THERAPY 2016; 10:2681-90. [PMID: 27601885 PMCID: PMC5003518 DOI: 10.2147/dddt.s109760] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The novel (1-(4-aryl)-1H-1,2,3-triazol-4-yl)methyl, substituted phenyl-6-methyl-2-oxo-1,2,3,4-tetrahydropyrimidine-5-carboxylate derivatives were synthesized by the click reaction of the dihydropyrimidinones, bearing a terminal alkynyl group, with various substituted aryl azides at room temperature using a catalytic amount of Cu(OAc)2 and sodium ascorbate in a 1:2 ratio of acetone and water as a solvent. The newly synthesized compounds were characterized by a number of spectroscopic techniques, such as infrared, liquid chromatography-mass spectrometry, 1H, and 13C nuclear magnetic resonance along with single crystal X-ray diffraction. The current procedure for the synthesis of 1,2,3-triazole hybrids with dihydropyrimidinones is appropriate for the synthesis of a library of analogs 7a-l and the method accessible here is operationally simple and has excellent yields. The title compounds 7a-l were evaluated for their in vitro antitubercular activity against H37RV and multidrug-resistant strains of Mycobacterium tuberculosis by resazurin microplate assay plate method and it was found that compound 7d was promising against H37RV and multidrug-resistant strains of M. tuberculosis at 10 and 15 μg/mL, respectively.
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Affiliation(s)
- Katharigatta N Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia; Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - G B Dharma Rao
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Subhrajyoti Bhandary
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Melendhran Pillay
- Department of Microbiology, National Health Laboratory Services, KZN Academic Complex, Inkosi Albert Luthuli Central Hospital, Durban, South Africa
| | - Deepak Chopra
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal, India
| | - Bandar E Aldhubiab
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Mahesh Attimarad
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Osama Ibrahim Alwassil
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Sree Harsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Koleka Mlisana
- Department of Microbiology, National Health Laboratory Services, KZN Academic Complex, Inkosi Albert Luthuli Central Hospital, Durban, South Africa
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15
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Venugopala KN, Nayak SK, Gleiser RM, Sanchez-Borzone ME, Garcia DA, Odhav B. Synthesis, Polymorphism, and Insecticidal Activity of Methyl 4-(4-chlorophenyl)-8-iodo-2-methyl-6-oxo-1,6-dihydro-4H-pyrimido[2,1-b]quinazoline-3-Carboxylate Against Anopheles arabiensis Mosquito. Chem Biol Drug Des 2016; 88:88-96. [PMID: 26841246 DOI: 10.1111/cbdd.12736] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 01/12/2016] [Accepted: 01/26/2016] [Indexed: 11/28/2022]
Abstract
Mosquitoes are the major vectors of pathogens and parasites including those causing malaria, the most deadly vector-borne disease. The negative environmental effects of most synthetic compounds combined with widespread development of insecticide resistance encourage an interest in finding and developing alternative products against mosquitoes. In this study, pyrimido[2,1-b]quinazoline derivative DHPM3 has been synthesized by three-step chemical reaction and screened for larvicide, adulticide, and repellent properties against Anopheles arabiensis, one of the dominant vectors of malaria in Africa. The title compound emerged as potential larvicide agent for further research and development, because it exerted 100% mortality, while adulticide activity was considered moderate.
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Affiliation(s)
- Katharigatta N Venugopala
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001, South Africa
| | - Susanta K Nayak
- Department of Chemistry, Visvesvaraya National Institute of Technology, Nagpur, Maharashtra, 440010, India
| | - Raquel M Gleiser
- CREAN-IMBIV (CONICET-UNC), Universidad Nacional de Córdoba, Av. Valparaíso s.n., Córdoba, 5000, Argentina.,FCEFyN, Universidad Nacional de Córdoba, Av. Vélez Sársfield 299, Córdoba, 5000, Argentina
| | - Mariela E Sanchez-Borzone
- Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET-Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba, 5016, Argentina
| | - Daniel A Garcia
- Instituto de Investigaciones Biológicas y Tecnológicas (IIBYT), CONICET-Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Córdoba, 5016, Argentina
| | - Bharti Odhav
- Department of Biotechnology and Food Technology, Faculty of Applied Sciences, Durban University of Technology, Durban, 4001, South Africa
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16
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Panini P, Gonnade RG, Chopra D. Experimental and computational analysis of supramolecular motifs involving Csp2(aromatic)–F and CF3groups in organic solids. NEW J CHEM 2016. [DOI: 10.1039/c5nj03211c] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural motif by Csp2–F and CF3group have been identified and investigated by the PIXEL method and QTAIM approach.
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Affiliation(s)
- Piyush Panini
- Crystallography and Crystal Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- India-462066
| | - Rajesh G. Gonnade
- Center for Materials Characterization (CMC)
- CSIR-National Chemical Laboratory
- Pune-411008
- India
| | - Deepak Chopra
- Crystallography and Crystal Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- India-462066
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17
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Venugopala KN, Govender R, Khedr MA, Venugopala R, Aldhubiab BE, Harsha S, Odhav B. Design, synthesis, and computational studies on dihydropyrimidine scaffolds as potential lipoxygenase inhibitors and cancer chemopreventive agents. DRUG DESIGN DEVELOPMENT AND THERAPY 2015; 9:911-21. [PMID: 25733811 PMCID: PMC4338777 DOI: 10.2147/dddt.s73890] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Dihydropyrimidine scaffold has a wide range of potential pharmacological activities such as antiviral, antitubercular, antimalarial, anti-inflammatory, and anticancer properties. 5-Lipoxygenase enzyme is an enzyme responsible for the metabolism of arachidonic acid to leukotrienes. The elevated levels of this enzyme and its metabolites in cancer cells have a direct relation on the development of cancer when compared to normal cells. The development of novel lipoxygenase inhibitors can have a major role in cancer therapy. A series of substituted 1,4-dihydropyrimidine analogues were synthesized and characterized by (1)H-NMR, (13)C-NMR, and HRMS. Molecular docking against lipoxygenase enzyme (protein data bank code =3V99) was done using Molecular Operating Environment 2013.08 and Leadit 2.1.2 softwares and showed high affinities. The synthesized compounds were tested for their lipoxygenase inhibitory activity and showed inhibition ranging from 59.37%±0.66% to 81.19%±0.94%. The activity was explained by a molecular docking study. The title compounds were also tested for cytotoxic activity against two human cancer cell lines Michigan Cancer Foundation-7 and human melanoma cells and a normal peripheral blood mononuclear cell line.
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Affiliation(s)
- Katharigatta N Venugopala
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia ; Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - Reshme Govender
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
| | - Mohammed A Khedr
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia ; Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Helwan University, Ein Helwan, Cairo, Egypt
| | - Rashmi Venugopala
- Department of Public Health Medicine, University of KwaZulu-Natal, Howard College Campus, Durban, South Africa
| | - Bandar E Aldhubiab
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Sree Harsha
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa, Kingdom of Saudi Arabia
| | - Bharti Odhav
- Department of Biotechnology and Food Technology, Durban University of Technology, Durban, South Africa
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18
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Panini P, Chopra D. Experimental and computational insights into the nature of weak intermolecular interactions in trifluoromethyl-substituted isomeric crystalline N-methyl-N-phenylbenzamides. NEW J CHEM 2015. [DOI: 10.1039/c5nj01670c] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The nature and role of weak interactions, involving fluorine in crystallineN-methyl-N-phenylbenzamides, have been studied in the absence of strong H-bonds.
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Affiliation(s)
- Piyush Panini
- Crystallography and Crystal Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- 462066 India
| | - Deepak Chopra
- Crystallography and Crystal Chemistry Laboratory
- Department of Chemistry
- Indian Institute of Science Education and Research Bhopal
- 462066 India
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