4.Which is the most thermodynamically stable product of the following aldol condensation reaction? orino NaOH `H. Me `Me ELOH a. E, Z b. Е, E c. Z, E d. Z,Z
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- Which of the following aldehydes does not undergo an aldol condensation when mixed with base? A. (CH3)3CCHO B. C6H5CH2CHO C. CH3CHO D. CH3CH2CHOWhat conjugate base must be formed during the E1cb mechansim in an aldol condensation reaction running under basic conditions? А. enol В. B-hydroxy carbonyl C. a,B-unsaturated carbonyl D. enolate5. Which of the following compounds will not undergo Aldol reaction and why? H H а. b. CH3 с. d. H;C `CH3
- Which of the given enolates can not be formed during the course of following aldol reaction? flor CH3 a. b. О с. Lov CH3 H₂C² FCH₂ + CH₂CH3 H3C CH₂CH3 NaOH5. Which Sharpless Asymmetric Dihydroxylation reagent and substrate would you use to make this diol? OH ? ? ОН5. Which Sharpless Asymmetric Dihydroxylation reagent and substrate would you use to make this diol? OH orloo он ? ?
- What types of species are the electrophile and nucleophile in an aldol addition? 1. Nu: ester, E+: carbonyl 2. Nu: carbonyl, E+: carbonyl 3. Nu: carbonyl, E+: ester 4. Nu: ester, E+: ester2. When the following pair of reactants are combined in the presence of a basic catalyst, a number of aldol addition products are possible). NaOH/H₂O A CH3 a. b. C. H₂C Draw the structure for the enolate ion (show both of the relevant resonance structures). Draw the structures for all possible aldol addition products (also show the enolate ion and electrophilic carbonyl compound responsible for each product). For each of the aldol addition products predicted in part b, draw the structures for all of the corresponding aldol condensation products after loss of water (if E/Z isomers are possible, show both isomers)Draw the major product of the aldol condensation reaction between two of equivalents of this aldehyde with the conditions provided. Ignore inorganic byproducts. 1. H3O+, heat 2. Neutralizing work-up Drawing H Q
- Draw the major product of the aldol addition reaction between two of equivalents of this aldehyde with the conditions provided. Ignore inorganic byproducts. 1. H3O+ 2. Neutralizing work-up Drawing H Q5. Which Sharpless Asymmetric Dihydroxylation reagent and substrate would you use to make this diol? OH g ? ? ÕHDraw the major product of this aldol addition reaction. Ignore inorganic byproducts. 1. LDA 2. C6H11CH2CHO 3. Neutralizing work-up Drawing Q