Synthesis, structural characterization, biological evaluation and molecular docking studies of new platinum(ii) complexes containing isocyanides

2018 ◽  
Vol 42 (11) ◽  
pp. 8681-8692 ◽  
Author(s):  
Masood Fereidoonnezhad ◽  
Hamid R. Shahsavari ◽  
Sedigheh Abedanzadeh ◽  
Ali Nezafati ◽  
Ali Khazali ◽  
...  

Platinum(ii) complexes with various isocyanides are prepared and their biological activities are studied.

2020 ◽  
Vol 17 (7) ◽  
pp. 873-883
Author(s):  
Pulabala Ramesh ◽  
Vankadari Srinivasa Rao ◽  
Puchakayala Muralidhar Reddy ◽  
Katragadda Suresh Babu ◽  
Mutheneni Srinivasa Rao

Background:: Most of the currently available pharmaceutical drugs are either natural products or analogues of natural products. Flavonoids are plant based natural polyphenolic compounds which exhibit a wide range of biological activities. Chrysin, a natural flavone, exhibits several biological activities like antiallergic, anti-inflammatory and anticancer. Many efforts were made to enhance the biological activity of chrysin. In continuation of our work on synthetic modifications of chrysin, amino-alcohol containing heterocyclic moiety is linked to chrysin at C (7) position to enhance its biological activity. Methods:: A series of new C (7) modified analogues of chrysin (3a-k) have been designed and synthesized in two steps. Chrysin, on reacting with epichlorohydrin in the presence of K2CO3 in DMF gave epoxide (2) which was made to react with cyclic secondary amines in the presence of LiBr to form the designed products (3a-k). All the synthesized compounds (3a-k) were well characterized by 1H NMR, 13C NMR and mass spectral data. The synthesized analogues (3a-k) were screened for their in vitro biological activities against a panel of bacterial and fungal strains. Molecular docking studies were also performed on these compounds with E. coli FabH (1HNJ) and S. cerevisiae (5EQB) enzymes, to support the observed biological activities. Results:: A series of new 2-hydroxy 3-amino chrysin derivatives (3a-k) were synthesized in two steps, starting with chrysin and their structures were characterized by spectral analysis. In vitro biological activities of these analogues against a panel of bacterial and fungal strains indicated that some of the derivatives manifested significant activities compared to standard drugs. Molecular docking and binding energy values were also correlated with experimental antimicrobial screening results. Lipinski’s “rule of five” is also obeyed by these analogues (3a-k) and exhibit drug-likeness. Conclusion:: In the present study, a series of new C (7) modified chrysin analogues (3a-k) were synthesized and tested for their in vitro antimicrobial activities. These biological studies indicated that some of the derivatives exhibited moderate to good antimicrobial activities compared to standard drugs. Molecular docking studies performed on these compounds correlated with the experimental antimicrobial activities. The results obtained in the study will be useful in establishing new drug entities to control the pathogenic epidemics.


2020 ◽  
Vol 32 (9) ◽  
pp. 2125-2129
Author(s):  
RAMARAJAN RAJALAKSHMI ◽  
RAJAVEL SANTHI ◽  
THANGARAJ ELAKKIYA

A series of new 4-thiazolidinone derivatives of 2-(4-chlorophenyl)-3-(6-(thiophen-2-yl)-4-p-tolyl-4H-1,3-oxazin-2-yl)- thiazolidin-4-one (7h-m) are synthesized because of its wide range of biological activities.1H & 13C NMR, IR studies were applied for the elucidation of all the synthesized compounds. All the synthesized compounds have been tested for antidiabetic and antioxidant activity in vitro method against standard. The analogs 7h-m was evaluated for α-amylase and α-glucosidase inhibitory potential. The structures of all the compounds have been screened for antioxidant activity using DPPH radical scavenging assay, NO scavenging method. Molecular docking studies were accomplished in addition to understand the binding affinity of those compounds with PDBID 2HR7 which showed that the synthesized derivatives bind in the lively binding site of the target protein


2013 ◽  
Vol 22 (11) ◽  
pp. 5256-5266 ◽  
Author(s):  
Vikas Garg ◽  
Ankit Kumar ◽  
Anurag Chaudhary ◽  
Saurabh Agrawal ◽  
Praveen Tomar ◽  
...  

2021 ◽  
Vol 47 (6) ◽  
pp. 1293-1300
Author(s):  
Goda Pankaja Kumar ◽  
Thuraka Sekhar ◽  
Pinnu Thriveni ◽  
Annavarapu Venkateswarlu ◽  
Kotha Peddanna ◽  
...  

Author(s):  
Punabaka Jyothi ◽  
Kuna Yellamma

Objective: Alzheimer’s disease (AD), a progressive neurodegenerative disorder with many cognitive and neuropsychiatric symptoms, is biochemically characterized by a significant decrease in the brain neurotransmitter Acetylcholine (ACh).Methods: In the present insilico study, six plant bioactive compounds namely Harmol, Vasicine, Harmaline, Harmine, Harmane and Harmalol (from P. Nigellastrum Bunge) were analyzed for their inhibitory role on AChE (Acetylcholinesterase) and BChE (Butyrylcholinesterase) activity by applying the molecular docking studies. Other parameters viz. determination of molecular interaction-based binding affinity values, protein-ligand interactions, Lipinski rule of five, functional properties and biological activities for the above compounds were also calculated by employing the appropriate bioinformatics tools.Results: The results of docking analysis clearly showed that Harmalol has highest binding affinity with AChE (-8.6 kcal/mole) and BChE (-8.0 kcal/mole) but it does not qualified the enzyme inhibitory activity, since it was exerted, and also has least percentage activity on AD and neurodegenerative disease. Whereas, the Harmine has been second qualified binding affinity (-8.4 kcal/mol) and first in other parameters when compared with Harmalol.Conclusion: Based on docking results and other parameters conducted, we are concluding that Harmine is the best compound for further studies to treat AD.Keywords: Alzheimer's disease (AD), Acetylcholinesterase, Butyrylcholinesterase, Lead Molecules


2017 ◽  
Vol 14 (12) ◽  
pp. e1700295 ◽  
Author(s):  
Saghi Sepehri ◽  
Sepehr Soleymani ◽  
Rezvan Zabihollahi ◽  
Mohammad R. Aghasadeghi ◽  
Mehdi Sadat ◽  
...  

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