All stereoisomers of three diepoxyalkenes derived from (3Z,6Z,9Z)-trienes with a C-21, C-19, or C-18 straight chain, lymantriid sex pheromones and their candidates, were synthesized by MCPBA oxidation of optically active epoxyalkadienes. Their chromatographic behaviors were examined with GC and LC equipped with achiral and chiral columns. Detailed inspection of the mass spectra of these epoxides indicated the following diagnostic ions for determining the chemical structures: m/z 128, 167, M-87 and M-85 for (Z)-cis-3,4-cis-6,7-diepoxy-9-enes; m/z 111, M-125 and M-69 for (Z)-cis-6,7-cis-9,10-diepoxy3-enes; and m/z M-125 and M-139 for (Z)-cis-3,4-cis-9,10-diepoxy-6-enes. Mass chromatographic analysis that monitored these fragment ions revealed the existence of a new pheromonal compound with a C-21 chain in an extract from virgin females of a lymantriid species, Perina nuda F. The three diepoxyalkenes were converted into the corresponding DMDS adducts, which showed characteristic ions from fragmentation between the two thiomethyl groups, reflecting the position of an original double bond.
Syntheses of optically active pheromones with an epoxy ring, (+)-disparlure and both the enantiomers of (3z,6z)--9,10-epoxy-3,6-heneicosadiene
作者:Kenji Mori、Takashi Ebata
DOI:10.1016/s0040-4020(01)87314-2
日期:1986.1
(+)-Disparlure 1 and both the enantiomers of (3Z,6Z)-cis-9,10-epoxy-3, 6-heneicosadiene 2 were synthesized in optically pure forms employing the Sharpless asymmetric epoxidation as the key-step. The natural pheromone 2 isolated from Estigmene acrea was shown to possess (9S,10R)-stereochemistry.
Synthesis of optically active pheromones with an epoxy ring, (+)-disparlure and the saltmarsh caterpillar moth pheromone [()-3,6--1-9,10-epoxyheneicosadiene]
作者:Kenji Mori、Takashi Ebata
DOI:10.1016/s0040-4039(01)82934-8
日期:1981.1
Alkylative epoxide rearrangement. A stereospecific approach to chiral epoxide pheromones
作者:Thomas W. Bell、James A. Ciaccio
DOI:10.1021/jo00071a026
日期:1993.9
The alkylative rearrangement of 1,2-epoxy-3-alkanol tosylates is applied to the synthesis of chiral epoxide pheromones. Attack at the terminal carbon atom of epoxy tosylates by lithioacetylenes and cyclization of the intermediate tosyloxy alcohols produces internal epoxides in high yield. The method is stereospecific: threo-epoxy tosylates give eL's-epoxides, and erythro-epoxy tosylates yield trans-epoxides. Several diastereomerically pure epoxides were prepared in high optical purity from chiral pool intermediates derived from sugars. Pheromone components prepared include (+/-)-cis-epoxyalkene 20 and both enantiomers of cis-epoxy diene 16, a female sex pheromone component of a number of lepidopteran species. These results demonstrate that alkylative rearrangement of 1,2-epoxy-3-alkanol tosylates complements existing methods for stereoselective synthesis of epoxides, including the Payne rearrangement and Sharpless epoxidation.
NIKOLAEVA, L. A.;KOVALEV, B. G., ZH. ORGAN. XIMII, 1985, 21, N 4, 746-750
作者:NIKOLAEVA, L. A.、KOVALEV, B. G.
DOI:——
日期:——
BELL, THOMAS W.;CIACCIO, JAMES A., TETRAHEDRON LETT., 29,(1988) N 8, 865-868