Pheromone synthesis. Part 262: Determination of the absolute configuration of the female sex pheromone [(1 S ,2 S )-(−)-(1,2-dimethyl-3-methylenecyclopentyl) acetaldehyde] of the pineapple mealybug ( Dysmicoccus brevipes ) by synthesis coupled with X-ray analysis
作者:Kenji Mori、Jun Tabata
DOI:10.1016/j.tet.2017.09.046
日期:2017.11
synthesized. Chirality was introduced by means of lipase-catalyzed asymmetric acetylation of (±)-2,3-dimethyl-2-cyclopenten-l-ol. X-ray analysis of (−)-camphanate ester of (1S,2S)-(−)-2-(1,2-dimethyl-3-methylenecyclopentyl)ethanol confirmed its (1S,2S)-absolute configuration. The natural pheromone was identified with the (1S,2S)-aldehyde by comparing the specific rotation, enantioselective GC retention
合成了(抗-1,2-二甲基-3-亚甲基环戊基)乙醛的对映体,其中之一是菠萝粉虱(Dysmicoccus brevipes)的雌性信息素。通过脂肪酶催化的(±)-2,3-二甲基-2-环戊烯-1-醇的不对称乙酰化引入手性。对(1 S,2 S)-(-)-2-(1,2-二甲基-3-亚甲基环戊基)乙醇的(-)-樟脑酸酯的X射线分析证实了其(1 S,2 S)-绝对构型。通过比较比旋光度,对映选择性GC保留时间和信息素活性,可将天然信息素与(1 S,2 S)-醛鉴别。