Design, synthesis, and SAR study of 3-(benzo[d][1,3]dioxol-5-yl)-N-benzylpropanamide as novel potent synergists against fluconazole-resistant Candida albicans.

Bioorganic & medicinal chemistry letters(2017)

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摘要
Based on our previous discovery and SAR study on the lead compounds 7d, 5 and berberine which can significantly enhance the susceptibility of fluconazole against fluconazole-resistant Candida albicans, a series of 3-(benzo[d][1,3]dioxol-5-yl)-N-(substituted benzyl)propanamides were designed, synthesized, and evaluated for their in vitro synergistic activity in combination with fluconazole. The series 2a-f were designed by replacing the amide moiety of the lead compound 7d with retro-amide moiety, and compounds 2a and 2b showed more activity than the lead 7d. Furthermore, introducing biphenyl moiety into series 2d-f afforded series 3a-r, most of which exhibited significantly superior activity to the series 2d-f. Especially, compound 3e, at a concentration of 1.0µg/ml, can enhance the susceptibility of fluconazole against fluconazole-resistant Candida albicans from 128.0µg/ml to 0.125-0.25µg/ml. A clear SAR of the compounds is discussed.
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