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- 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.Arrange the following carbonyl compounds in order of increasing reactivity towards nucleophiles with the least reactive first (" NH2 H3C OCH, HC H H3C OH HC H3C CH3 IV VIWhich of the starting materials could be used to prepare the below compound by an aldol reaction? оа. b. d. co.
- 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-methylbutanal• What would be the major elimination product obtained from the reaction of each of the following alkyl halides with hydroxide ion? Note: Major product in E2 reaction is the most stable alkene a) H₂C CH₂ tom, CH, b) H₂C CH, Br .CH, c) CH₂ CH₂ Br CH₂Which alkyl halide in each pair is more reactive in an E2 reaction with hydroxide ion?
- Rank the set of compounds in order of reactivity (fastest to slowest) in a nucleophilic addition-elimination reaction with a nucleophile such as CH3NH2.2. 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)5. Which Sharpless Asymmetric Dihydroxylation reagent and substrate would you use to make this diol? OH orloo он ? ?
- Which alkyl halide would react the fastest under substitution conditions with HO-?rank these from least to most reactive in nucleophilic acyl substitution with a nucleophile I)CH3COOC2H5 II) CH3COO-Na+ III)CH3COCl IV) CH3CONH21. Identify whether the following substrates preferentially participate in the SN1 or SN2 reaction. A. В. 2. In the following compound, circle the leaving group(s) that occupy allylic and benzylic positions: Br- Br Br 3. Indicate whether the following nucleophile favors an SN2 or SNI reaction: SH
