Antimicrobial agents from higher plants: Activity and structural revision of flemiflavanone-D from Flemingia stricta
作者:Lester A. Mitscher、Sitaraghav R. Gollapudi、Ish K. Khanna、Steven D. Drake、T. Hanumaiah、T. Ramaswamy、Kolluru V. Jagannadha Rao
DOI:10.1016/0031-9422(85)80020-0
日期:1985.11
Abstract Flemiflavanone-D from Flemingia stricta is active in vitro against Staphylococcus aureus and Mycobacterium smegmatis . Reexamination and interpretation of its spectral properties required revision of its molecular formula to C 25 H 28 O 6 and its structure to 2 S -5,7,4′-trihydroxy-6-γ,γ-dimethylallyl-3′-γ,γ-dimethylallyl-oxidoflavan-4-one. The new structure was confirmed when reaction with
摘要 Flemingia stricta 的 Flemiflavanone-D 在体外对金黄色葡萄球菌和耻垢分枝杆菌具有活性。对其光谱特性的重新检查和解释需要将其分子式修改为 C 25 H 28 O 6 并将其结构修改为 2 S -5,7,4'-三羟基-6-γ,γ-二甲基烯丙基-3'-γ,γ -二甲基烯丙基-氧化黄烷-4-一。当在乙腈中与氯三甲基硅烷碘化钠反应脱氧并环化氟米黄酮-D 为已知的双环紫杉醇 A 时,证实了新结构。通过圆二色性测量确定氟米黄酮-D 的绝对立体化学为 2 S。