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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.Draw the mechanism of the following alkylation reaction that occurs via an enolate intermediate. о сн, о сн, (1) LDA Ph-C-CH-CH, Ph-C-C-CH, (2) Ph — CH, — Вr ČH,-PhDoes this crossed aldol or Claisen reaction would predominantly produce a single product from the reaction of the two reactants shown to the left of the arrow?
- Will each of the following reactions follow an El or E2 mechanism? to to HO,need explanationThe aldol reaction is catalyzed by acid as well as by base. Write a detailed mechanism for the acid-catalyzed condensation of acetaldehyde (equation below), and use it to respond. H₂C H acetaldehyde Draw the reactive electrophile. HCI H3C OH O H B-hydroxybutanal HCI warm • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • Do not include lone pairs in your answer. They will not be considered in the grading. • When there is a choice, draw the most stable resonance form. H3C 2-butenal H
- In a mixed aldol addition reaction between these two molecules, which one forms the enolate ion? لمسلم -CH3 acetophenone -H benzaldehyde acetophenone benzaldehyde both of them can form an enolate. neither of them can form an enolate.Draw the major organic product of the reaction shown.Drag and drop the appropriate reaction conditions over each arrow as appropriate. Keep in mind the differences between acidic and basic conditions in the ring-opening of epoxides. OH OMe A OMe ОН B OH NM22 ŅM22 OH NaOMe МеОн H,SO4 MeOH NaNMe2 HNME2 H2SO4 HNME2
- 2 CH3COOCH,CH3 C2H5O'K*/C2H5OH ---> CH3COCH,COOCH,CH3 [+] Hofmann elimination Clemmensen reduction Claisen condensation O Cannizzaro reaction O Aldol condensationThis reaction is an example of conjugate addition of a nucleophile to an a,ß-unsaturated carbonyl. CНз CHз Нао ОН Draw the two resonance structures of the enolate anion intermediate for this reaction.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
