Prenylated Coumarins: Natural Phosphodiesterase-4 Inhibitors from <i>Toddalia asiatica</i>
作者:Ting-Ting Lin、Yi-You Huang、Gui-Hua Tang、Zhong-Bin Cheng、Xin Liu、Hai-Bin Luo、Sheng Yin
DOI:10.1021/np401040d
日期:2014.4.25
Bioassay-guided fractionation of the ethanolic extract of the roots of Toddalia asiatica led to the isolation of seven new prenylated coumarins (1–7) and 14 known analogues (8–21). The structures of 1–7 were elucidated by spectroscopic analysis, and their absolute configurations were determined by combined chemical methods and chiral separation analysis. Compounds 1–5, named toddalin A, 3‴-O-demethyltoddalin
生物测定法指导的Toddalia asiatica根部乙醇提取物的分馏导致分离出七种新的烯丙基香豆素(1 – 7)和14种已知的类似物(8 – 21)。通过光谱分析阐明了1 – 7的结构,并通过化学方法和手性分离分析确定了它们的绝对构型。化合物1 - 5,命名toddalin A,3''' - ø -demethyltoddalin A,和toddalins B-d,代表苯基丙烯酸偶联异戊二烯化香豆素的一个不寻常的基团。化合物1 – 21并使用tri标记的腺苷3',5'-环一磷酸([ 3 H] -cAMP)作为底物,针对其对磷酸二酯酶4(PDE4)的抑制活性,筛选了四个修饰的类似物10a,11a,13a和17a。),这是治疗哮喘和慢性阻塞性肺疾病的药物靶标。化合物3,8,10,10A,11,11A,12,13,17,和21展出抑制作用IC 50值小于10μM。活性最高的化合物Toddacoumalone(8)(IC