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19. Provide the product for the alkylation transformation: o LDA / EtBr product D C. A....
19. Provide the product for the alkylation transformation: O LDA / EtBr product D. C. A. B. 22. The mixed Claisen reaction shown provides product in only a trace amount. The starting materials are obtained upon isolation. Why? CO2Me NaoMe CO2Me MeOH CO2Me / dil. HCI Ph + A. pka of the propyl ester is too high B. there is only one a-proton C. the benzoate ester is resonance stabilized D. pka of the propyl ester is too low
9. Select the product for the reaction depicted below: LDA / EtBr بل من C, A, B. 10. Select the compound that can not be made using the malonic ester synthesis: 0 0 0 CH OMe Meo بد CH Ph CH A, B, C, Ph D,
13. Give the curved arrow mechanism for each alkylation reaction. a. LiNiPr, (LDA) a. b. CH,Br CH, a. LiNiPr, (LDA) b. CHy-CHCH, b. 14. Explain why reaction G gives good yields of the product shown, while the yields are not as good with reaction H. о a. LDA G: b. CH,I CH a. LDA H: b. CH,I CHy 15. Give the major organic product of each reaction. Cl2 a. LDA CH,CO,H b. PЬСH, a. LDA Br2 b. f. b. CH,CH,CI...
8. Give the major organic product of each reaction. NaOH,H,O c. mild H a. LDA b. مل، بل NaOH,H,O, heat c. mild H NaOH, H2O NaOH,H,O ) 9. Give the major organic product of each intramolecular Aldol reaction. NaOH,HO heat NaOH, H20 heat NaOH, H0
HW 22: Enolates 1. Provide a detailed, stepwise mechanism for the base-catalyzed enolization (keto enol tautomerism) of acetaldehyde. 2. Provide the major organic product of the folowing reaction. 3. Provide the major organic product of the following reaction LDA 4. Which of the following ketones will give a positive iodoform test? A) 4-heptanone D) cyclohexanone B) 3-hexanone C)2-hexanone 5. Provide the major organic product of the following reaction. 6. Provide the structure of the major organic product which results when...
Give the major organic product of each reaction. 8. a. LDA н b. H c. mild H NaOH, H,O н a, LDA b. f. н NaOH, H,O, heat c. mild H NaOH, H,O O NaOH, H,O H CYD a. LDA b. d. h. NaOH, H,O, heat c. mild H*, heat 9. Give the major organic product of each intramolecular Aldol reaction. NaOH, H,O a. heat H NaOH, H2O b. heat NaOH, H,O NaOH, H20 d. heat 10. Propose starting materials...
please answer all question and provide explanation or mechanism for each. thank you. 19. What is the best choice of reagent(s) to perform the following transformation? OCHA a. CH,OH, H,SO b. CH:I, H2SO4 c. NaOCH d. CH,Li 20. What is the major organic product obtained from the following reaction of ethyl benzoate with the OH нс ск 1. 2 eq. CH3MOCI | Phocн,сн, 2. H,0* PhDcн, CH Ph CH P OHP OCH CHE a. b. 1 2 3 4 C....
10. Provide the reagents necessary to complete the following transformation. 13. Provide the structure of the major organic product of the reaction below 10. Provide the reagents necessary to complete the following transformation. A. 1. BH3 THF 2. H202, HO B). H20, H2SO4 C. OsO4. H202 D. CH3CO3H E. 1. CH3CO3H 2. H, H20 11. Which of the following is the best reaction sequence to use if one wants to accomplish a Markovnikov addition of water to an alkene with...
Provide the major product for the following reactions: b. NaH, THF CH Br 1.1 eq LDA, THF D O NaOD 1. LDA (1.1 eq) 2. CH2CH 3. LDA (1.1 eq, -78 °C) 4. CH 1 equiv. Br2 NaOH, H2O
Mechanism with major product included 1) LDA 2) ?: O: c) 3) H,o* : O 1) LDA 2) : Br d) : Ci: NaOEt E2 e)