作者:Yuxin Zhao、David J. Schenk、Shunji Takahashi、Joe Chappell、Robert M. Coates
DOI:10.1021/jo049058c
日期:2004.10.1
A series of eremophilane sesquiterpene alcohols and hydrocarbons was prepared from the phytoalexin capsidiol (1) for mechanistic studies with epiaristolochene synthase and epiaristolochene dihydroxylase. Among them, 3-deoxycapsidiol (10) was obtained through selective derivatization and reductive cleavage of the equatorial 3α hydroxyl group. Two novel isomers of aristolochene and eremophilene were
由植物抗毒素辣椒素(1)制备了一系列的全草醇倍半萜烯醇和碳氢化合物,用于表皮雌激素合酶和表皮雌激素二羟化酶的机理研究。其中,通过对赤道3α羟基进行选择性衍生化和还原性裂解,获得了3-脱氧辣椒糖醇(10)。从1-和3-脱氧辣椒素二醇异构体中获得了马兜铃属和双亲的两个新的异构体。通过将表aristolochen-1-one甲苯磺酰with与儿茶酚硼烷共轭还原,然后亚硫酸盐消除和二酰亚胺重排,获得了4-表皮亲油(17)。Epiaristolochen-3-one(27a的差向异构化)在C4甲基处被还原,导致先前未知的马兜铃异构体eremophila-9(10),11(12)-二烯(30)。表1和表2中收集了相关的民俗亲和物和二烯的旋光度和特征性1 H NMR数据。最后,使用生物测定法评估了辣椒素及其合成衍生物的抗真菌效力。辣椒素的最低抑菌浓度(3-10 ng)比任何一种衍生物低至少1个数量级,且