Synthesis and HMG CoA reductase inhibition of 4-thiophenyl quinolines as potential hypocholesterolemic agents.
A series of novel 4-thiophenyl quinoline-based mevalonolactone derivatives were synthesized from ethyl 6,7,8-trisubstituted-4-chloro-quinoline-3-carboxylates by several reactions and evaluated for their ability to inhibit the rat HMG CoA reductase in vitro. It was found that substitution with a variety of thiophenyl groups at position 4 in quinoline resulted in retention or enhancement of the inhibition and the preferable groups were 4-isopropyl-thiophenyl and 3-methoxy-thiophenyl. (4R,6S)-6-[(E)-2-(6,7,8-trifluoro-4-isopropylthiophenyl-quinoline-3-yl)-ethenyl]-3,4,5,6-tetrahydro-4-hydroxy-2H-pyran-2-one (A16) and (4R, 6S)-6-[(E)-2-(6-fluoro-4,7-di-(3-methoxy-thiophenyl)-quinoline-3-yl)-ethenyl]-3,4,5,6-tetrahydro-4-hydroxy-2H-pyran-2-one (A23) were approximately three times more potent than rosuvastatin or pitavastatin in inhibiting HMG CoA reductase and selected as the hypocholesterolemic candidates for further evaluation.[1]References
- Synthesis and HMG CoA reductase inhibition of 4-thiophenyl quinolines as potential hypocholesterolemic agents. Cai, Z., Zhou, W., Sun, L. Bioorg. Med. Chem. (2007) [Pubmed]
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