scholarly journals Microwave-Assisted Synthesis, Molecular Docking Studies and Biological Evaluation of Benzothiazole Containing Novel Indole Derivatives

2021 ◽  
Vol 33 (11) ◽  
pp. 2755-2761
Author(s):  
Shaheen Sultana ◽  
P. Pandian ◽  
B. Rajkamal

The synthesis of novel indole derivatives 4a-o using a microwave assisted method via Schiff’s base and Mannich base reaction mechanism was described. Compounds 3a-c were synthesized via reaction of 2-amino benzothiazole with substituted isatin by Schiff base reaction mechanism. Also, indole derivatives 4a-o were synthesized via reaction of compounds 3a-c with substituted benzaldehydes by Mannich base reaction. The biological potentials of the newly synthesized indole derivatives were evaluated for their anthelmintic activity and in vitro anticancer activity by MTT assay. The anticancer activity results suggested that indole derivatives 4c-o have activity against MCF-7 and SKOV3 cells in comparison with doxorubicin as standard drug. Furthermore, the molecular docking studies of these novel derivatives of indole showed good agreement with the biological results when their binding pattern and affinity towards the active site of EGFR was also investigated.

2020 ◽  
Vol 5 (4) ◽  
pp. 301-306
Author(s):  
Praveen Kumar ◽  
Jai Prakash Kumar ◽  
Juhi Barnwal ◽  
Ritu Singh

Novel 4-{3-[2-(2-morpholin-4-yl-ethoxy)phenyl]-5-phenyl-pyrazol- 1-yl}benzenesulfonamide (7) was synthesized and evaluated for its anti-breast cancer activity. It was prepared by cyclocondensation reaction of morpholine-substituted β-diketone, 1-[2-(2-morpholin-4-yl-ethoxy)- phenyl]-3-phenyl-propane-1,3-dione (3) with 4-hydrazinobenzenesulfonamide hydrochloride (6). Chemical structure of titled compound (7) was confirmed by FTIR, 1H & 13C NMR and HRMS spectroscoic analyses. The anticancer activity of titled compound 7 was evaluated against MCF-7 breast cancer cell line by MTT assay. Molecular docking was performed to predict its plausible binding with the estrogen receptor α(ERα) using Molecular Operating Environment 2019.0101 software. The MTT assay results showed that titled compound 7 exhibited better anticancer activity against MCF7 cells (IC50: 4.25 μM) than standard drug, 4-hydroxytamoxifen (IC50: 8.22 μM). Results of molecular docking studies were found in good agreement with the results of anticancer evaluation, as the binding score of titled compound 7 (-16.9872 kcal/mol) was lower as compared to 4-hydroxytamoxifen (-15.1112 kcal/mol). The new cationic interaction of titled compound 7 with Trp383 and hydrogen bonding interaction with Phe404 in active site of ERα made its anticancer activity better than 4-hydroxytamoxifen. Thus, 4-{3-[2-(2-morpholin-4-yl-ethoxy)phenyl]-5-phenyl-pyrazol- 1-yl}benzenesulfonamide (7) was emerged as a potent anti-breast cancer agent.


2020 ◽  
Author(s):  
Mohsinul Mulk Bacha ◽  
Humaira Nadeem ◽  
Shafiq Ur Rehman ◽  
Sadia Sarwar ◽  
Aqeel Imran ◽  
...  

Abstract In diabetes, increased accumulation of sorbitol has been associated with diabetic complications through polyol pathway. Aldose reductase (AR) is one of the key factors involved in reduction of glucose to sorbitol, thereby its inhibition is considered to be important for the management of diabetic complications. In the present study, a series of seven 4-oxo-2-thioxo-1,3-thiazolidin-3-yl acetamide derivatives 3(a-g) were synthesized by the reaction of 5-(4-hydroxy-3-methoxybenzylidene)-4-oxo-2-thioxo-1,3-thiazolidin-3-yl acetic acid (2a) and 5-(4-methoxybenzylidene)-4-oxo-2-thioxo-1,3-thiazolidin-3-yl acetic acid (2b) with different amines. The synthesized compounds 3(a-g) were investigated for their in vitro aldehyde reductase (ALR1) and aldose reductase (ALR2) enzyme inhibitory potential. Compound 3c, 3d, 3e, and 3f showed ALR1 inhibition at lower micromolar concentration whereas all the compounds were more active than the standard inhibitor valproic acid. Most of the compounds were active against ALR2 but compound 3a and 3f showed higher inhibition than the standard drug sulindac. Overall the most potent compound against aldose reductase was 3f with an inhibitory concentration of 0.12 ± 0.01 µM. In vitro results showed that vanillin derivatives exhibited better activity against both aldehyde reductase and aldose reductase. The molecular docking studies were carried out to investigate the binding affinities of synthesized derivatives with both ALR1 and ALR2.


RSC Advances ◽  
2020 ◽  
Vol 10 (20) ◽  
pp. 11615-11623 ◽  
Author(s):  
Ravinder Dharavath ◽  
Nalaparaju Nagaraju ◽  
M. Ram Reddy ◽  
D. Ashok ◽  
M. Sarasija ◽  
...  

Coumarin-based 1,4-disubstituted 1,2,3-triazole derivatives were synthesized using a highly efficient, eco-friendly protocol via a copper(i)-catalyzed click reaction between various substituted arylazides and terminal alkynes.


2020 ◽  
Author(s):  
Mohsinul Mulk Bacha ◽  
Humaira Nadeem ◽  
Sumera Zaib ◽  
Sadia Sarwar ◽  
Aqeel Imran ◽  
...  

Abstract In diabetes, increased accumulation of sorbitol has been associated with diabetic complications through polyol pathway. Aldose reductase (AR) is one of the key factors involved in reduction of glucose to sorbitol, thereby its inhibition is considered to be important for the management of diabetic complications. In the present study, a series of seven 4-oxo-2-thioxo-1,3-thiazolidin-3-yl acetamide derivatives 3(a-g) were synthesized by the reaction of 5-(4-hydroxy-3-methoxybenzylidene)-4-oxo-2-thioxo-1,3-thiazolidin-3-yl acetic acid (2a) and 5-(4-methoxybenzylidene)-4-oxo-2-thioxo-1,3-thiazolidin-3-yl acetic acid (2b) with different amines. The synthesized compounds 3(a-g) were investigated for their in vitro aldehyde reductase (ALR1) and aldose reductase (ALR2) enzyme inhibitory potential. Compound 3c, 3d, 3e, and 3f showed ALR1 inhibition at lower micromolar concentration whereas all the compounds were more active than the standard inhibitor valproic acid. Most of the compounds were active against ALR2 but compound 3a and 3f showed higher inhibition than the standard drug sulindac. Overall the most potent compound against aldose reductase was 3f with an inhibitory concentration of 0.12 ± 0.01 µM. In vitro results showed that vanillin derivatives exhibited better activity against both aldehyde reductase and aldose reductase. The molecular docking studies were carried out to investigate the binding affinities of synthesized derivatives with both ALR1 and ALR2. The binding site analysis of potent compounds revealed similar interactions as were found by cognate ligands within the active sites of enzymes.


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