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23. Select the product for the reaction shown: NaOH Ph H2O, THE 5°C ? OH OH...
26. Select the product for the transformation indicated: CO Me COMO Meo OME NaoMe MOH CO, Me 7 dil HCI ? OH CO, Me A. C D B. 27. Select the needed sequence of reactions to load from the starting material to the desired product: OH 0 OH A. PCC / Nah, MeOH / LDA, acetaldehyde / dil. HCI ? B. H.CrO4/LDA, Mel / LDA. propanal i dil. HCI C. MCPBA / Nah, MeBr / Nah, propyl-1/KOH D. NBS /...
21. Benzaldehyde is treated with 3,3-dimethyl-2-butanone and KOH at 100 °C. Select the resulting product: Ph OH OH O Ph Ph Ph A. B. C D. 22. The mixed Claisen reaction shown provides product in only a trace amount. The starting materials are obtained upon isolation. Why? CO,Me CO-Me NAOMe MeOH dil. HCI .COMe Ph A. pka of the propyl ester is too high B. there is only one c-proton C. the benzoate ester is resonance stabilized D. pka of...
13. Select the key step for the mechanism of decarboxylation: 0 HO OH Оме HO H2SO4 OME Me product O'HO A В. D 14. Which reagent(s) is(are) needed to complete the desired synthesis?: 0 ? A. NaOme MeO H dil. HCI B. NaOH, CHO} heat C, LDA, (MO) CO / MCPBA D. CO, heat
10. Select the compound that can not be made using the malonic ester synthesis: O O OH MeO Оме OH Ph OH A. B. Ph C. D. 11. In general both the malonic ester and acetoacetate synthesis require the addition of dilute acid in order to generate the final product. Why? A. the alkoxy cation needs to be eliminated C. the ionized cation partitions to the aqueous layer B. the stabilized enolate adds a proton in the separatory funnel D....
Predict the products for each reaction shown below N NaOH N NaOH THF LDA 1) NaH, THF EtO THF-78 °C 2) CH3CH2Br heat HO CH3COOH KOH CH3NH2 KOH MeOH 1) NaOMe, MeOH 1) HCI, H20 OH 2) PhCH2Br 2) 180 °C
9. Select the reaction sequence that will produce the desired product. OH HNO3, H2SO4 1.Sn, HCI NaNO, HCI CuBr 2.NaOH HNO3, H2SO4 1.Sn, HCI CuBri PCC 2.NaOH HNO3, H2SO4 1.Sn, HCI NANO,.HCI Br2, FeBrz III. 2.NaOH HNO3, H2SO4 Br2, FeBrz 1.Sn, HCI 1.NaNO2,HCI IV 2.NaOH 2. H20, heat HNO3, H2SO4 1.Sn, HCI NaNO2,HCI 1. Bra, FeBrz V. 2.NaOH 2. H,O, heat
22. The mixed Claisen reaction shown provides product in only a trace amount. The starting materials are obtained upon isolation. Why? CO Me CO Me NaOme MeOH CO Me / dil. HCI Ph Y come 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 23. Select the product for the reaction shown: NaOH Ph H2O, THE 5 °C...
o GO 34. Aryl diazonium ions are formed from anilines reacted with: A. HNO, B. HNO3, H2SO4 C. H2NNH, KOH D. NaNO, HCI 35. Starting with phthalic anhydride, which other reagents are needed for the Gabriel amine synthesis?: ? A. NH3, A/KOH, 1-pentyl-Br /H2NNH2 NH2 B. KOH, NH3 /LDA, 1-pentanol /NaOH C. NBS, Br, A/HCI, pentanamide / NaNO2, HCI D. NH3, HCI / NaH, 1-penty-CI/ KCN 36. Select the final product for the multi-step sequence indicated below: NHACCI EICI NaNO2...
30. Select the product for the reaction shown below: но KOH O Da, ? D. A. 0 B. C. 31. Provide the final product that results upon completion of the multi-step synthesis shown: NaoMe MeOH NaOME HO / dil PhyP-CH, OMo ? HCI Br NaoMe OH OH **Ph A. Br Br C. B. COH D
30. Select the product for the reaction shown below: HO KOH A. B. C. 31. Provide the final product that results upon completion of the multi-step synthesis shown: NaoMe MeOH NaoMe H30+ / dil A Ph3P=CH2 ? OMe HCI Br Br NaOME O OH OH P+Ph3 Br A. Br C. D. B. CO2H