B) Which of the following compound will undergo self-aldol condensation in the presence of cold dilute alkali, why? a) C.H5CHO . b) CHỊCH CHO ¢)CH=C-CHOd)CH=CH-CHO
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- Draw the major organic product of the following reaction sequence. 1) Hg(OAc)2, MeOH 2) NaBH4 ?16. Draw the structure of the aldol self-condensation (followed by dehydration) product for each of the following compounds. If a compound does not undergo aldol self-condensation, explain why it does not. a) || CH3CHCH₂CH T CH₂ b)Draw the major organic product of the following reaction sequence. ? 1) RCO3H 2) NaSMe 3) H3O+
- D) 2) What two organic starting materials are required to produce cinnamaldehyde (PHCH=CHCHO) via a crossed aldol condensation followed by dehydration? A) PHCH3 and CH3CHO B) PHCHO and CH3CH2CHO C) PHCHO and CH3CH2OH D) PHCHO and CH3CHO uart "nolizable ketone to its enolate1. Provide the mechanism of the reaction shown in the picture. 2. Explain why it cannot be done in basic conditions. 3. Why is the enol tautomer favored over the keto tautomer? Ph H3C OH H H3O+/H₂O HO H3C Ph2 CH3COOCH,CH3 C2H5O'K*/C2H5OH ---> CH3COCH,COOCH,CH3 [+] Hofmann elimination Clemmensen reduction Claisen condensation O Cannizzaro reaction O Aldol condensation
- Would the following reaction form the product as shown? (CH3CH₂)2NH H A) Yes, it is easier to form the diketone enolate due to the very acidic nature of the methylene hydrogens in between the two carbonyl groups. B) Yes, it is easier to form the aldehyde enolate than the diketone enolate due to the very acidic alpha hydrogens of the aldehyde. C) NO, it is difficult to form the diketone enolate by abstracting the methylene hydrogens due to steric hindrance from the two carbonyl groups. D) NO, it is difficult to form the aldehyde enolate since the alpha hydrogens of the aldehyde are not that acidic.Acetal formation must be catalyzed by an acid. Explain why it cannot be catalyzed by CH3O-.Which option best describes the arrow-pushing mechanism for the addition step in an aldol condensation reaction under basic conditions? i) ii) iii) iv) HO O i O i i O iv
- Q3: write the structure and the mechanism of the aldol condensation product of each of the aldehydes. Also one of these aldehydes can undergo aldol addition, but not able condensation. Which one? Why:- a) H₂C CH₂ 3-methylbutanal b) سابع مرکب امرول H₂C 2-methylbutanal18) What two organic starting materials are required to produce cinnamaldehyde (PhCH=CHCHO) via a crossed aldol condensation followed by dehydration? A) PhCH3 and CH3CHO B) PhCHO and CH3CHO C) PhCHO and CH3CH2CHO D) PhCHO and CH3CH₂OH bDraw the major product of this reaction. Include any relevant stereochemistry. Ignore inorganic byproducts. EtO-P Eto OEt BuLi H