Abstract
Microwave assisted simple, efficient procedure for one-pot Biginelli condensation reaction of aldehydes, β-ketoesters, and urea or thiourea in solvent-free condition employing solid silica-based sulfonic acid as a novel, heterogeneous reusable catalyst is described. Compared to the classical Biginelli reaction conditions, the present method has the advantages of good yields, short reaction times, and experimental simplicity. The newly synthesized compounds have been screened to in vitro antihypertensive and calcium channel blocking activity done by IC50 measurement method with nifedipine as standard.
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Acknowledgments
The corresponding author is highly grateful to Madhya Pradesh Council of Science & Technology for financial support. Authors are also thankful to Deputy Director and Head, SAIF, Central Drug Research Institute (CDRI), Lucknow for providing elemental analysis and spectral data and R. V. Sree Harsha, Department of Microbiology, University of Hyderabad for providing microbiological facilities.
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Jetti, S.R., Upadhyaya, A. & Jain, S. 3,4-Hydropyrimidin-2-(1H)one derivatives: solid silica-based sulfonic acid catalyzed microwave-assisted synthesis and their biological evaluation as antihypertensive and calcium channel blocking agents. Med Chem Res 23, 4356–4366 (2014). https://doi.org/10.1007/s00044-014-0988-y
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DOI: https://doi.org/10.1007/s00044-014-0988-y