New Syntheses of 1,7-Dimethylnonyl Propanoate, the Western Corn Rootworm Pheromone, in Four Different Ways<i>via</i>Cross Metathesis, Alkylation and Coupling Reactions
作者:Kenji MORI
DOI:10.1271/bbb.90805
日期:2010.3.23
the four stereoisomers of 1,7-dimethylnonyl propanoate, the female sex pheromone of the western corn rootworm (Diabrotica virgifera virgifera LeConte), was synthesized in four different ways by employing one of the following four reactions as the key step: (i) cross metathesis using the Grubbs I catalyst, (ii) cross metathesis using the Grubbs II catalyst, (iii) alkylation of an alkynide anion, and
通过以下四个反应之一作为关键步骤,以四种不同方式合成了1,7-二甲基壬基丙酸酯(西方玉米根虫(Diabrotica virgifera virgifera LeConte)的雌性信息素)的四种立体异构体的混合物: i)使用Grubbs I催化剂交叉复分解,(ii)使用Grubbs II催化剂交叉复分解,(iii)炔阴离子的烷基化,和(iv)在四氯铜酸二锂存在下的格利雅偶联。尽管交叉复分解方法可以实现信息素的两个短合成(4或6个步骤),但通过格氏试剂偶联,可以实现最便宜和最有效的合成,从而以2%-甲基- 1-丁醇(8步)。