Question

4) Jasmone, which contributes to the odor of jasmine, can be prepared by intramolecular aldol condensation of a diketone. What is the structure of the diketone?

Answer 1

Given, 米Jasmone,uhich contributes to the odox of jasmine can be psepazedan intamoleulay aldol condemsation of a cliketone Aldol conduntahion carbonly compunds having e-hydrozen atom under gpes condsnsabon n the presence of babe to foma daoxy ca、bonly compo compound is on Smple heating forms α, β-unsatu -vated carbonly compound dol condensatin veactan of acetaldelyde as follows: 0 он Naoh 3 atetaldehyde -2 ema In irbamoleculav aldot condensation eactin tuo nylrupsaxe present n a single molecaule the scuxe of jasmone, it is cleav * Lf we ing was formed. that the couble bond in the rn om dehydaionof the aldol odt

*Then we cam make a cad at this carbon bond and See hat the staling matenal th inaa roleulay Aldol condensadion (0s the dihchne 0 undec -g-ene 2,5-dione * The compoun d undec-8-ene 2,5- dione undergpe s ntbamolecular Aldol to tnm Jasnone. The xeacion isas olouvs 0 heat 0 undec - g-eme-2,5 -dione 米The mechanism of the action is as follows

0: OH undec-8- ene- 2,5- dione enolate ion 1 H,0