Synthesis of 6,6-dimethyltricyclo[5.4.0.02,8]undecane-2,9-diol for (ent-)longipinane-type sesquiterpenoids using two types of radical cyclization reactions
作者:Kazuma Matsunaga、Kazuhiko Takatori、Hiroshi Kogen、Naoki Saito
DOI:10.1016/j.tetlet.2018.09.030
日期:2018.10
.4.0.02,8]undecane-2,9-diol, a key precursor to (ent-)longipinane-type sesquiterpenoids, is described. This unique core common to (ent-)longipinanes was constructed using two types of intramolecular radical cyclization reactions, namely, intramolecular coupling of an acid chloride and an alkyl iodide mediated by SmI2, TBAI and HMPA, and the coupling of a ketone and an epoxide mediated by Cp2TiI2 and
描述了一种合成路线,以合成6,6-二甲基三环[5.4.0.0 2,8 ]十一烷-2,9-二醇,这是(对-)long啶烷型倍半萜的关键前体。(ent-)longipinanes共有的独特核是使用两种类型的分子内自由基环化反应构建的,即,由SmI 2,TBAI和HMPA介导的酰氯与烷基碘的分子内偶联以及酮与Cp 2 TiI 2和SmI 2介导的环氧化物。