Following is an outline of a synthesis of bombykol, the sex attractant of the male silk- worm moth. Of the four stereoisomers possible for this conjugated diene, the 10-trans- 12-cis isomer shown here is over 106 times more potent as a sex attractant than any of the other three possible stereoisomers. H H ÓMe ÓMe trans 12 cis HO (3) ÓMe Bombykol C16H3,0 Show how this synthesis might be accomplished and explain how your proposed syn- thesis is stereoselective for the 10-trans-12-cis isomer.
Following is an outline of a synthesis of bombykol, the sex attractant of the male silk- worm moth. Of the four stereoisomers possible for this conjugated diene, the 10-trans- 12-cis isomer shown here is over 106 times more potent as a sex attractant than any of the other three possible stereoisomers. H H ÓMe ÓMe trans 12 cis HO (3) ÓMe Bombykol C16H3,0 Show how this synthesis might be accomplished and explain how your proposed syn- thesis is stereoselective for the 10-trans-12-cis isomer.
Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter18: Functional Derivatives Of Carboxylic Acids
Section: Chapter Questions
Problem 18.54P
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In the first step, a Wittig reagent with an anion stabilizing group will give E alkene and the formed double bond is conjugated to the aldehyde group in the product. In the second conversion, an alkyl Wittig reagent is used which produces predominantly the Z product. In the las t reaction, lithiumaluminium hydride followed by hydrolysis reduces the ester group to the alcohol group.
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