Thermal rearrangement of bicyclogermacrane-1,8-dione. Synthesis of humulenedione and (−)-cubenol, starting from natural (+)-Aromadendrene-V
作者:Harrie J.M. Gijsen、Joannes B.P.A. Wijnberg、Aede de Groot
DOI:10.1016/s0040-4020(01)85013-4
日期:1994.4
bond in 4 produces (+)-bicyclogermacrane-1,8-dione (5). Thermal rearrangement of 5 gives via a homo [1,5] hydrogen shift at relatively low temperature the humulenedione 6, and at higher temperature (FVP) the products 9 and 10 both with a cadinane skeleton. The naturally occurring humulenedione (7) and (−)-cubenol (17) can be synthesized starting from 6 and 9, respectively.
用K / Al 2 O 3处理主要含有(+)-芳香金属烯(1)和(-)-alaroaromadendrene(2)的桉树球菌的蒸馏尾巴,可将1和2定量转化为异戊二烯(4)。中央双键的4氧化裂解产生(+)-bicyclogermacrane-1,8-dione(5)。5的热重排通过相对[1,5]的氢位移在相对较低的温度下产生了humulenedione 6,在较高的温度(FVP)下产生了产物9和10两者都带有卡丁烷骨架。天然存在的草烯二酮(7)和(-)-小茴香酚(17)可以分别从6和9开始合成。