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- a. Which of the following compounds would you expect to react with a nucleophile at the highest rate and why? NH F3C NH CF3 NH CF3 b. Reductions using LiAlH4 require a separate acid workup step, while reductions using NaBH4 do not. c. Aldehydes tend to be more hydrated that ketones.Which of the starting materials could be used to prepare the below compound by an aldol reaction? оа. b. d. co.Provide the reactants that would give the following aldol condensation product. ہولی ہولی من ہے تو جو A. H B. .H C. D. .H H
- 2. 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)Provide the reactant(s) that would give the following possible aldol condensation product. A. H B. H enlig Si E. C. D. OH O2. When the following pair of reactants are combined in the presence of a basic catalyst, a number of aldol addition products are possible (since both of the reactants possess an acidic alpha proton). a. b. C. CH3 + H₂C H NaOH/H₂O Draw the structures for the two possible enolate ions. 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)
- 1. 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 PhSelect the di-carbonyl compound that would efficiently form the structure shown via an intramolecular Aldol reaction. A. or B. •oo •ay E. og F. olDraw the major product of the aldol addition reaction between two equivalents of this ketone with the conditions provided. Ignore inorganic byproducts. 1. H3O+ 2. Neutralizing work-up &
- 2. What nucleophile could be used to produce each of the following products from 1- bromobutane? Identify the functional group introduced in each product. a. b. H;C CH3 CN H3C SH H3C N3 H3C e. d. CHWhich of the following pairs will give two cross-aldol products? and H. (H3C)3C H. and H. H TH. CHO and TH. and H. H.This reaction is an example of conjugate addition of a nucleophile to an a,ß-unsaturated carbonyl. LOCH3 H20 H3C H3C° OCH3 OCH3 Draw the two resonance structures of the enolate anion intermediate for this reaction.