Synthesis and Anti-proliferative Activity of 4H-Chromone Based Phenylhydrazones, Pyrazolecarboxylates and Pyrazolylmethanones
摘要:
Series of 4H-chromone-based hydrazones 3a-z, pyrazolecarboxylates 5a-x and pyrazolylmethanones 6a-u were prepared and screened for their anti-proliferative activity on A549, HeLa, DU145 and MDAMB 231 cell lines. The hydrazone compound 3s with a chloro substituent on the chromanone moiety and a methoxy group on the phenyl ring displayed promising activity on A549, HeLa and DU145 cell lines. The compound 5p with a bromo substituent on the chromanone moiety and a methyl group on the phenyl ring displayed potent activity on DU145. Furopyrazolecarboxylate 5w having a methyl substituent on the phenyl ring displayed potent activity on HeLa cell line. The pyrazolylmethanone 6e with a fluoro substituent on the phenyl ring and compound 6j having a methyl substituent on the chromanone moiety and a methoxy group on the phenyl ring have shown promising anti-proliferative activity on HeLa cell line.
Convenient synthesis of 4<i>H</i>-chromenyl-tetrahydro-2<i>H</i>-pyrancarboxylates and cleavage of chromone and pyran rings leading to 5-(2-hydroxybenzoyl)-2-(trifluoromethyl)-1,2-dihydropyridine-3-carboxylates
作者:Kommera Rajkumar、Kurma Siva Hariprasad、Balasubramanian Sridhar、Bhimapaka China Raju
DOI:10.1080/00397911.2016.1242747
日期:2016.12.16
prepared by the reaction of 3-formylchromones 1a–k and ethyl 4,4,4-trifluoro-3-oxobutanoate 2a with good yields. Thus obtained 4H-chromenyl-tetrahydro-2H-pyrancarboxylates 3a–k were reacted with amines 4a–e to provide series of 5-(2-hydroxybenzoyl)-2-(trifluoromethyl)-1,2-dihydropyridine-3-carboxylates 5a–o. The reaction proceeded via Michael addition (C-N bond formation) and followed by cleavage of chromone