Total Synthesis of (+)-Antrocin and Its Diastereomer and Clarification of the Absolute Stereochemistry of (−)-Antrocin
作者:Sheng-Han Huang、Kai-Hsiang Liang、Jia-Syun Lu、Wei-Sheng Chang、Ming-Der Su、Te-Fang Yang
DOI:10.1021/acs.joc.7b01600
日期:2017.9.15
Using 2,2-dimethyl cyclohexanone as the starting compound, (+)-antrocin and its diastereomer have been synthesized. The absolute stereochemistry of (−)-antrocin, a natural sesqui-terpenoid and an antagonist in some types of cancer cells, was clarified using the character data of (+)-antrocin. The synthetic procedure involved two key steps: (1) the reaction of vinyl magnesium bromide with 2,2-dimet
以2,2-二甲基环己酮为起始化合物,合成了(+)-antrocin及其非对映异构体。使用(+)-antrocin的特征数据阐明了(-)-antrocin(一种天然的倍半萜类化合物和拮抗剂)在某些类型的癌细胞中的绝对立体化学。合成过程涉及两个关键步骤:(1)乙烯基溴化镁与2,2-二甲基-6- t的反应-丁基-二甲基-甲硅烷氧基-甲基-1-环己酮生成乙烯基环己醇衍生物,以及(2)含樟脑酸酯的三烯中间体的高度立体选择性分子内Diels-Alder(IMDA)反应。从密度泛函理论计算中获得了含樟脑酸酯的三烯的IMDA反应可能的过渡态的相对能级,证明了目标分子的立体定向形成。