spinosan A 、 乙酸酐 在
三乙胺 作用下,
反应 1.5h,
以9 mg的产率得到Spinosan A Acetate
参考文献:
名称:
Metabolites of the “Smoke Tree”, Dalea spinosa, Potentiate Antibiotic Activity against Multidrug-Resistant Staphylococcus aureus
摘要:
Two new 2-arylbenzofuran aldehydes (1 and 2) and three known phenolic compounds (3-5) were isolated from organic extracts of Dalea spinosa. These compounds were evaluated for their intrinsic antimicrobial activity and. their ability to perform as multidrug-resistance inhibitors by potentiating the activity of known antimicrobials against a variety of pathogenic microorganisms. Compound 1 and its acetate derivative 6 exhibited no direct antimicrobial activity but enhanced the effect of the weak plant antimicrobial berberine when tested against Staphylococcus aureus. Additional potentiation assays with S. aureus overexpression and knockout isogenic efflux mutants for the NorA pump were done in order to assess whether the potentiating effects were associated with inhibition of this known pump mechanism.
Metabolites of the “Smoke Tree”, <i>Dalea spinosa</i>, Potentiate Antibiotic Activity against Multidrug-Resistant <i>Staphylococcus aureus</i>
作者:Gil Belofsky、Roberto Carreno、Kim Lewis、Anthony Ball、Gabriele Casadei、George P. Tegos
DOI:10.1021/np058057s
日期:2006.2.1
Two new 2-arylbenzofuran aldehydes (1 and 2) and three known phenolic compounds (3-5) were isolated from organic extracts of Dalea spinosa. These compounds were evaluated for their intrinsic antimicrobial activity and. their ability to perform as multidrug-resistance inhibitors by potentiating the activity of known antimicrobials against a variety of pathogenic microorganisms. Compound 1 and its acetate derivative 6 exhibited no direct antimicrobial activity but enhanced the effect of the weak plant antimicrobial berberine when tested against Staphylococcus aureus. Additional potentiation assays with S. aureus overexpression and knockout isogenic efflux mutants for the NorA pump were done in order to assess whether the potentiating effects were associated with inhibition of this known pump mechanism.