Can pinacolone under go this sort of reaction by itself to give a high yield of
ID: 949994 • Letter: C
Question
Can pinacolone under go this sort of reaction by itself to give a high yield of product? 5) a. Yes or No (Circle one) b. Describe how you came to your conclusion. 6) Can piperonaldehyde under go this sort of reaction by itself to give a high yield of product? a. b. Yes or No (Circle one) Describe how you came to your conclusion. 7) Assign which atoms in the adduct give which chemical shifts in the ' H and NMR, the spectra are provided in your lab manual. (The singlet at 7.26 ppm in the H NMR and the triplet at 77.00 ppm in the C NMR are due to solvent.) H NMR (CDCI,): eg 0.50 ppm 3H. -the CH3 on the ring- ppm. H ppm, ( ppm. (-__11. Ppm, ( ppm. H ppm. H, C NMR (CDCI) Ppm ppm. ppm, ppm. Ppm ppm Ppm, ppm. ppm, Ppm,Explanation / Answer
5. a. No
b. Pinnacolone do not react easliy with themselve in aqueous base, they need a benzaldehyde to react so has to produce high yield.
6. a . Yes.
b. This type of mixed aldol condensation reaction produces high yield, because piperonaldehyde cannot react itself by an aldol condenstion reaction because it has no alpha hydrogen.