3-Substituted 2-Phenylimidazo[2,1-b]benzothiazoles: Synthesis, Anticancer Activity, and Inhibition of Tubulin Polymerization
Author(s)
Kamal, Ahmed
Sultana, Farheen
Ramaiah, M. Janaki
Srikanth, Yellamelli V.V.
Viswanath, Arutla
Kishor, Chandan
Sharma, Pranjal
Pushpavalli, Sreerangam N.C.V.L.
Addlagatta, Anthony
Pal-Bhadra, Manika
Griffith University Author(s)
Year published
2012
Metadata
Show full item recordAbstract
new series of 3-substituted 2-phenylimidazo[2,1-b]benzothiazoles (3 a–h) were synthesized by C-arylation of 2-arylimidazo[2,1-b]benzothiazoles using palladium acetate as catalyst, and the resulting compounds were evaluated for their anticancer activity. Compounds 3 a, 3 e, and 3 h exhibited good antiproliferative activity, with GI50 values in the range of 0.19–83.1 μM. Compound 3 h showed potent anticancer efficacy against 60 human cancer cell lines, with a mean GI50 value of 0.88 μM. This compound also induced cell-cycle arrest in the G2/M phase and inhibited tubulin polymerization followed by activation of caspase-3 and ...
View more >new series of 3-substituted 2-phenylimidazo[2,1-b]benzothiazoles (3 a–h) were synthesized by C-arylation of 2-arylimidazo[2,1-b]benzothiazoles using palladium acetate as catalyst, and the resulting compounds were evaluated for their anticancer activity. Compounds 3 a, 3 e, and 3 h exhibited good antiproliferative activity, with GI50 values in the range of 0.19–83.1 μM. Compound 3 h showed potent anticancer efficacy against 60 human cancer cell lines, with a mean GI50 value of 0.88 μM. This compound also induced cell-cycle arrest in the G2/M phase and inhibited tubulin polymerization followed by activation of caspase-3 and apoptosis. A high-throughput tubulin polymerization assay showed that the level of inhibition for compound 3 h is similar to that of combretastatin A-4. Molecular modeling studies provided a molecular basis for the favorable binding of compounds 3 a, 3 e, and 3 h to the colchicine binding pocket of tubulin.
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View more >new series of 3-substituted 2-phenylimidazo[2,1-b]benzothiazoles (3 a–h) were synthesized by C-arylation of 2-arylimidazo[2,1-b]benzothiazoles using palladium acetate as catalyst, and the resulting compounds were evaluated for their anticancer activity. Compounds 3 a, 3 e, and 3 h exhibited good antiproliferative activity, with GI50 values in the range of 0.19–83.1 μM. Compound 3 h showed potent anticancer efficacy against 60 human cancer cell lines, with a mean GI50 value of 0.88 μM. This compound also induced cell-cycle arrest in the G2/M phase and inhibited tubulin polymerization followed by activation of caspase-3 and apoptosis. A high-throughput tubulin polymerization assay showed that the level of inhibition for compound 3 h is similar to that of combretastatin A-4. Molecular modeling studies provided a molecular basis for the favorable binding of compounds 3 a, 3 e, and 3 h to the colchicine binding pocket of tubulin.
View less >
Journal Title
ChemMedChem
Volume
7
Issue
2
Subject
Medicinal and Biomolecular Chemistry not elsewhere classified
Medicinal and Biomolecular Chemistry
Organic Chemistry
Pharmacology and Pharmaceutical Sciences