Abstract
Synthetic analogues of the naturally occurring triterpenoid, lupeol by modification of A-ring and isopropylene moiety with different carboxylic acid functionalities and their biological activity were investigated. The analogues were designed by considering the incorporation of ester and amide linkages in the parent molecule. They were assayed for protein tyrosine phosphatase-1B (PTP-1B) inhibitory activity. Among them, compounds 9a, 9b, 14a, 14b and 14c showed significant dose-dependant inhibition at 10 μM concentration. Our report is marked by readily accessible synthesis, excellent yield and significant PTP-1B inhibitory effect.
Graphical abstract
A synthetic approach and in vitro PTP-1B inhibition of novel analogues of lupeol are described. Compounds 9a, 9b, 14a, 14b and 14a represent a new class of PTP-1B inhibitors in type 2 diabetes
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Acknowledgments
Authors are very thankful to UGC and CSIR, New Delhi for financial assistance as senior and junior research fellowships. M. F. K. is also acknowledging to SAIF division, CDRI for providing NMR and MASS spectral data as well as S. C. Tiwari for his technical assistance. CDRI communication number is 8633.
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Khan, M.F., Mishra, D.P., Ramakrishna, E. et al. Design and synthesis of lupeol analogues and their in vitro PTP-1B inhibitory activity. Med Chem Res 23, 4156–4166 (2014). https://doi.org/10.1007/s00044-014-0984-2
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DOI: https://doi.org/10.1007/s00044-014-0984-2