Recent Patents on Anti-Cancer Drug Discovery 2011-05-01

Synthesis, characterization and in-vitro antiproliferative effects of novel 5-amino pyrazole derivatives against breast cancer cell lines.

Hanumegowda Raju, Siddappa Chandrappa, Doddakunche S Prasanna, Hanumappa Ananda, Tandaga S Nagamani, Sonnahallipura M Byregowda, Kanchugarakoppal S Rangappa

Index: Recent Pat. Anticancer. Drug Discov. 6(2) , 186-95, (2011)

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Abstract

In search of synthetic chemotherapeutic substances capable of inhibiting, retarding, or reversing the process of multistage carcinogenesis, we synthesised a series of novel 1-(4-methoxybenzyl)-3-cyclopropyl-1H-pyrazol-5-amine derivatives 9(a-h) by a nucleophilic substitution reaction and characterized by (1)H and (13)C nuclear magnetic resonance (NMR), liquid chromatography mass spectrometry (LC/MS), Fourier-transform infrared (FTIR), and elemental analysis. These novel compounds were evaluated for their efficacy in inhibiting VERO normal and MCF-7 breast cancer cells proliferation by trypan blue exclusion assay, MTT assay, [(3)H] thymidine incorporation assay and DNA fragmentation analysis. Among the series, some compounds exhibited interesting growth inhibitory effects against cell lines. From the Structure-Activity Relationship studies, it has been revealed that, both novel patented compounds and therapeutic protocols of N-terminal pyrazole ring structures play key role in the antiproliferative activity.