Silicon in organic synthesis. Stereoselective synthesis of some insect sex pheromones
作者:T.H. Chan、K. Koumaglo
DOI:10.1016/0022-328x(85)87361-7
日期:1985.4
stereo-selectively the γ-product with trans-stereochemistry at the double bond. The trans-vinylsilanes are transformed stereoselectively to Z-vinyl iodides. Coupling of the vinyl iodides with organometallic reagents gives Z-alkenes. This approach has been applied to the synthesis of several insect sexpheromones.
Concise Total Synthesis of (+)-Disparlure and its trans-Isomer Using Asymmetric Organocatalysis
作者:Sung-Gon Kim
DOI:10.1055/s-0029-1216855
日期:2009.7
The efficient enantioselectivesynthesis of (+)-disparlure and its trans-isomer is described. This approach involves tandem asymmetric organocatalytic α-aminoxylation-allylation of an aldehyde and olefin cross metathesis using Grubbs’ catalyst as key steps. disparlure - totalsynthesis - organocatalysis - asymmetric synthesis - olefin cross metathesis
SYNTHESIS OF Z-OLEFIN-CONTAINING LEPIDOPTERAN INSECT PHEROMONES
申请人:California Institute of Technology
公开号:US20130231499A1
公开(公告)日:2013-09-05
The present invention is directed to methods of synthesizing insect pheromones, particularly lepidopteran insect pheromones, their precursors and derivatives from inexpensive, readily available starting materials using olefin metathesis catalysis.
The practical procedure for a preparation of 1-chloroalkyl p-tolyl sulfoxides in high optically active form: A very short synthesis of optically active disparlure
A chlorination of opticallyactive alkyl p-tolyl sulfoxides with N-chlorosuccinimide in dichloromethane in the presence of potassium carbonate afforded opticallyactive 1-chloroalkyl p-tolyl sulfoxides in 87–94% ee (88–94% chemical yields). The opticallyactive chloroalkyl sulfoxide was applied to a synthesis of opticallyactive (+)-disparlure.
Synthesis of all four isomers of disparlure using osmium-catalyzed asymmetric dihydroxylation.
作者:Ehud Keinan、Subhash C. Sinha、Anjana Sinha-Bagchi、Wang Zhi-Min、Zhang Xiu-Lian、K.Barry Sharpless
DOI:10.1016/s0040-4039(00)79002-2
日期:1992.10
(+)-Disparlure, the sex attractant emitted by the female gypsymoth, Portheriadispar (L.), and its (−)-enantiomer were synthesized in 43% yield and >99% ee, starting from undecanal and using the asymmetric dihydroxylation (AD) reaction. Similarly, the two trans-isomers of disparlure were synthesized in 51% yield and 95% ee.