Common synthetic strategy for optically active cyclic terpenoids having a 1,1,5-trimethyl-trans-decalin nucleus: syntheses of (+)-acuminolide, (−)-spongianolide A, and (+)-scalarenedial
作者:Noriyuki Furuichi、Toshiyuki Hata、Hartati Soetjipto、Mariko Kato、Shigeo Katsumura
DOI:10.1016/s0040-4020(01)00825-0
日期:2001.10
method for providing enantiomerically pure bi-, tri-, and tetracyclic frameworks having a 1,1,5-trimethyl-trans-decalin nucleus, and demonstrated their utility for terpenoid synthesis. Thus, we achieved the stereocontrolled total syntheses of (+)-acuminolide as a bicyclic, (−)-spongianolide A as a tricyclic, and (+)-scalarenedial as a tetracyclic terpenoid from the corresponding optically pure cyclic
我们已经开发了一种简单而实用的方法,可提供对映体纯的具有1,1,5-三甲基-反式十氢化萘核的双,三和四环骨架,并证明了它们可用于合成萜类化合物。因此,我们从相应的光学纯的环状β-酮酸酯中获得了立体控制的(+)-um啶内酯为双环,(-)-海绵状内酯A为三环和(+)-scal烯二醛作为四环萜烯的立体合成。通过重复相同的环构建方法,包括用路易斯酸将烯烃环化,然后分别使用手性助剂进行缩醛形成,进行简单的光学拆分,即可获得环戊二烯。这是合成具有1,1,5-三甲基-反式的对映体纯的环状萜类化合物的通用且有价值的策略-萘烷核。