Pheromone synthesis. Part 240: Cross-metathesis with Grubbs I (but not Grubbs II) catalyst for the synthesis of (R)-trogodermal (14-methyl-8-hexadecenal) to study the optical rotatory powers of compounds with a terminal sec-butyl group
作者:Kenji Mori
DOI:10.1016/j.tet.2009.02.064
日期:2009.5
(R)-Trogodermal (14-methyl-8-hexadecenal), the sex pheromone of Trogoderma species of pest insects against stored products, and its (S)-isomer were synthesized by using olefin cross-metathesis between (R)- or (S)-7-methyl-1-nonene and 8-nonenyl acetate as the key step. This step was successful with Grubbs I but not with Grubbs II catalyst. The latter caused randomization of the carbon skeleton to give
(- [R)-Trogodermal(14甲基-8-十六碳烯醛),性信息素斑皮蠹属对照存储产品害虫的种类,以及其(小号)通过使用烯烃之间(交叉复分解,合成异构体[R )-或(S)-7-甲基-1-壬烯和乙酸8-壬烯酯是关键步骤。该步骤对于Grubbs I是成功的,但是对于Grubbs II催化剂却不是成功的。后者导致碳骨架的随机化,从而产生异常产物的混合物,该异常产物具有比所需产物更长或更短的碳链。测量了18种新的和6种先前合成的具有仲仲丁基端基的化合物的比旋光度,得出的结论是[α] D +3.5至+6.5或-3.6至-6.4
Synthesis of optically active forms of (Z)-14-methylhexadec-8-enal
作者:K. Mori、T. Suguro、M. Uchida
DOI:10.1016/0040-4020(78)87008-2
日期:1978.1
The both enantiomers of (Z)-14-methylhexadec-8-enal were synthesized starting from (R)-(+)-citronellol. The (R)-(−)enantiomer (1) was about 250 times more active than its antipode (1') when tested on dermestid beetle.