(S)-3,7-Dimethyl-2-oxo-6-octene-1,3-diol: an aggregation pheromone of the Colorado potato beetle, Leptinotarsa decemlineata (Say)
摘要:
(S)-3,7-Dimethyl-2-oxo-6-octene-1,3-diol has been identified as a male-produced pheromone from the Colorado potato beetle. Its gross structure was deduced from its mass and NMR spectra plus synthesis from geraniol. The absolute configuration was determined to be (S) by syntheses of both enantiomers from (R)- and (S)-linalool, respectively. Published by Elsevier Science Ltd.
Oxidation of α-hydroxy containing monoterpenes using titanium silicate catalysts: comments on regioselectivity and the role of acidity
作者:Lee J. Schofield、Owain J. Kerton、Paul McMorn、Donald Bethell、Simon Ellwood、Graham J. Hutchings
DOI:10.1039/b201724p
日期:——
The regioselective epoxidation of monoterpenes in the liquid phase has been studied using the titanosilicates TS-1 and TiAlβ. A range of oxidants (hydrogen peroxide, tert-butylhydroperoxide and urea–hydrogen peroxide complex) have been studied in detail. The allylicalcohols linalool and geraniol have been studied alongside the non-allylic alcohol citronellol and the diene dihydromyrcene to help determine
A novel synthesis of the aggregation pheromone of the Colorado potato beetle, Leptinotarsa decemlineata, has been developed based on a Sharpless asymmetric epoxidation in combination with a chemoselective alcohol oxidation using catalytic [(neocuproine)PdOAc]2OTf2. Employing this approach, the pheromone was synthesized in 3 steps, 80% yield and 86% ee from geraniol.
The asymmetric dihydroxylation of geranyl acetate, neryl acetate and trans, trans -farnesyl acetate was studied using the new Sharpless' ligands (DHQD)2-PHAL and (DHQ)2-PHAL. High enantioselectivity was always observed. High positional selectivity for the 6,7-olefin was observed in the case of the monoterpene acetates.
ZHANG, LIAN;ZHOU, W.;XU, XING-XIANG, SCI. CHIN. , 32,(1989) N, C. 800-807
作者:ZHANG, LIAN、ZHOU, W.、XU, XING-XIANG
DOI:——
日期:——
Xu Daqiang, Park Christine Y., Sharpless K. Barry, Tetrahedron Lett, 35 (1994) N 16, S 2495-2498
作者:Xu Daqiang, Park Christine Y., Sharpless K. Barry