Versatile Route to <i>centro</i>-Substituted Triquinacene Derivatives: Synthesis of 10-Phenyltriquinacene
作者:Jay A. Cadieux、Donovan J. Buller、Peter D. Wilson
DOI:10.1021/ol035546f
日期:2003.10.1
the protected bicyclic enone (11). The resultant trimethylsilyl enol ether was then converted regioselectively to the C-2-allylated conjugate addition products (13, R = Ph). The allyl moiety, following oxidative cleavage of the carbon-carbon double bond, was used to elaborate the tricyclic ring system by an intramolecular aldol/acetal deprotection reaction. The product of this reaction was then converted
[反应:见正文]据报道,一种通用的制备中心取代的三喹并苯衍生物(1,R =各种取代基)的方法,以制备10-苯基三喹并苯(1,R = Ph)为例。通过三甲基甲硅烷基氯促进的衍生自苯基溴化镁的有机铜酸酯与受保护的双环烯酮(11)的共轭加成反应来安装季中心取代基(C-10)。然后将所得的三甲基甲硅烷基烯醇醚区域选择性地转化为C-2-烯丙基化的共轭加成产物(13,R = Ph)。碳-碳双键的氧化裂解后,烯丙基部分被用于通过分子内的醇醛/缩醛脱保护反应来精制三环系统。