Abstract
The carbon resonances were assigned for the bark beetle pheromones frontalin, exo-brevicomin, endo-brevicomin, α-multistriatin, and for the γ and δ isomers of multistriatin. The chemical shift changes that occurred with changes in orientation of the various alkyl substituents of the 6,8-dioxabicyclo (3.2.1)octane system were noted for carbons α, β, γ, and δ to the substituent in question. The γ effects observed for the ring carbons of the multistriatin isomers confirmed the relative stereochemistry of these compounds. Several small but significant δ effects were also observed. Only γ effects involving a changing relationship with one carbon can be considered reliable for stereochemical inferences in such sterically crowded ring systems.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
