作者:Takehiro Iwadate、Yutaka Kashiwakura、Noriyoshi Masuoka、Yoichi Yamada、Ken-ichi Nihei
DOI:10.1016/j.bmcl.2013.11.063
日期:2014.1
The concise synthesis of rhododendrol glycosides 3–8, which are novel derivatives of (+)-epirhododendrin (1) and (−)-rhododendrin (2), has been achieved in six steps from benzaldehyde 9. The key reactions include aldol condensation and trichloroacetimidate glycosylation. From biological studies, it has been determined that synthetic derivatives of 1 and 2 possess potent tyrosinase inhibitory activity
rhododendrol糖苷的合成简洁3 - 8,它们是新的衍生物(+) - epirhododendrin(1)和( - ) - rhododendrin(2),一直在六个步骤从苯甲醛达到9。关键反应包括醛醇缩合和三氯乙酰亚胺基糖基化。从生物学研究中,已经确定1和2的合成衍生物具有有效的酪氨酸酶抑制活性。特别是,纤维二糖苷8的抑制活性(IC 50 = 1.51μM)比曲酸高六倍。的[R差向异构体(4,6,和8)具有比相应的更有效的活性小号差向异构体(3,5,和7),这表明酪氨酸酶抑制活性显著通过rhododendrol苷的立体化学控制。