Chemo-enzymatic syntheses of drimane-type sesquiterpenes and the fundamental core of hongoquercin meroterpenoid by recombinant squalene–hopene cyclase
作者:Yukie Yonemura、Takuro Ohyama、Tsutomu Hoshino
DOI:10.1039/c1ob06419c
日期:——
Squalene–hopene cyclase (SHC) converts squalene (C30) into pentacyclic triterpenes of hopene and hopanol. A linear sesquiterpene, (6E,10E)-2,6,10-trimethyldodeca-2,6,10-triene, underwent cyclization catalyzed by SHC, affording the following six bicyclic sesquiterpenes (drimane skeleton) in relatively high yield (68%): drim-7(8)-ene, drim-8(12)-ene, drim-8(9)-ene, driman-8α-ol, driman-8β-ol, and the
角鲨烯–希望 环化酶(SHC)转换 角鲨烯(C 30)成五环三萜希望 和 醇。线性倍半萜,(6 E,10 E)-2,6,10-三甲基十二烷基-2,6,10-三烯,经SHC催化环化,得到以下六个双环倍半萜烯(德里曼 骨架)相对较高的收率(68%): drim-7(8)-烯, drim-8(12)-烯, drim-8(9)-烯,driman-8α-ol,driman-8β-ol和新的倍半萜烯,其名称为quasiclerodane,其骨架与双环戊二烯类似。为了扩大酶促合成的范围,对附加有酚部分的无环倍半萜进行SHC催化的酶促反应。成功制备了红槲皮素A和B中存在的环状美萜烯核心。的形成机理德里曼两种类型的倍半萜烯和红槲皮素A和B的环状金属萜烯核心。