Synthesis and evaluation of antimicrobial activity of 4H-pyrimido[2,1-b]benzothiazole, pyrazole and benzylidene derivatives of curcumin
作者:Pramod K. Sahu、Praveen K. Sahu、S.K. Gupta、D. Thavaselvam、D.D. Agarwal
DOI:10.1016/j.ejmech.2012.05.020
日期:2012.8
A novel, one-pot, simple, efficient procedure for 4H-pyrimido[2,1-b]benzothiazole (4a-h), pyrazole (6a-d) and benzylidene (7a-d) derivatives of curcumin under solvent and solvent free conditions in microwave with good yield is have been synthesized. The synthesized compounds were evaluated for their antibacterial activity against gram-positive and gram-negative bacteria viz. Staphylococcus aureus, Pseudomonas aeruginosa, Salmonella typhi, Escherichia coli, Bacillus cereus and Providencia rettgeri and antifungal activity against fungi viz Aspergillus niger, Aspergillus fumigates, Aspergillus flavus. Detailed mechanistic study shows reaction proceeds through Knoevenagel type intermediate 3a which has been suggested as key intermediate for reaction (Fig. 3). (C) 2012 Elsevier Masson SAS. All rights reserved.
Structure activity relationship, cytotoxicity and evaluation of antioxidant activity of curcumin derivatives
作者:Pramod K. Sahu、Praveen K. Sahu、Puran L. Sahu、Dau D. Agarwal
DOI:10.1016/j.bmcl.2015.12.013
日期:2016.2
compound 3c, (IC50 value 6.25 μM) has shown better cytotoxicity effect against three cell lines. According to results of SAR study, it was found that 4H-pyrimido[2,1-b]benzothiazole derivatives (2e and 2f), pyrazoles (3a, 3b, 3c and 3d) benzylidenes (4d) exhibited better antioxidant activity than curcumin. A correlation of structure and activitiesrelationship of these compounds with respect to drug