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A new synthesis of (Z,Z)-11,11-dimethoxy-6,9-heneicosadiene and 2-((Z,Z)-1,4-decadienyl)-2-ndecyl-1,3-dioxolane, precursors of (Z,Z)-6,9-heneicosadien-11-one, a pheromone component of the whitemarked tussock moth, Orgyia leucostigma (J.E. Smith) (Lepidoptera: Erebidae)
- Source :
- Canadian Journal of Chemistry. 100:422-428
- Publication Year :
- 2022
- Publisher :
- Canadian Science Publishing, 2022.
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Abstract
- The straightforward synthesis of two long-chain diene ketals, (Z,Z)-11,11-dimethoxy-6,9-heneicosadiene and 2-ndecyl-2-((Z,Z)-1,4-decadienyl)-1,3-dioxolane, is described. These two ketals are synthetic propheromones, or pheromone precursors, of the whitemarked tussock moth (WMTM, Orgyia leucostigma (J.E. Smith) (Lepidoptera: Erebidae)), whose unstable female-produced sex pheromone component, (Z,Z)-6,9-heneicosadien-11-one, lasts only 1–2 days in traps in the field. The two propheromones were synthesized by terminal alkyne/propargylic bromide couplings, facilitated by cesium carbonate, which assembled the 21-carbon chains with skipped diynes. Semi-reduction of the diynes gave the requisite dienes. These two diene ketals were then formulated into lures, which converted them in situ into the attractive (Z,Z)-6,9-heneicosadien-11-one. The performance of these lures is briefly described.
- Subjects :
- Organic Chemistry
General Chemistry
Catalysis
Subjects
Details
- ISSN :
- 14803291 and 00084042
- Volume :
- 100
- Database :
- OpenAIRE
- Journal :
- Canadian Journal of Chemistry
- Accession number :
- edsair.doi...........b8ec5e20eb9cea5390b4146989ce9cc3