* Incorrect. Propose an efficient synthesis for the following compound using an acetoacetic ester synthesis: EtO A. OEt The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. D. H3O+, heat AFE NO₂ B. HO E. Mel NO₂ C. NO₂ F. NaOEt NO₂
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- Current Attempt in Progress Propose an efficient synthesis for the following compound using an acetoacetic ester synthesis: OEt The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. Br Br Br A. B. Br D. HO', heat E. NaOEtX Incorrect. Propose an efficient synthesis for the following compound using an acetoacetic ester synthesis: EtO A. The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. D. H3O+, heat OEt ACB B. HO E. Mel C. F. NaOEtPropose an efficient synthesis for the following compound using an acetoacetic ester synthesis: OEt The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. Br Br A. B. Br D. H,O", heat E. NaOEt F.
- 7. Propose a synthesis for each ketone, using as one step in the sequence a Claisen condensation, hydrolysis, decarboxylation just like in problem 6. Ph тят Ph H * H HI O PhAn acetal produces the following three compounds upon hydrolysis. Of acetals A-E which could it be? H3CO OCH3 П A B U D Acetal A H2O H₂SO4(cat.) замен поста "OCH3 В + HO. H₂CO ОН D + OCH3 CH3OH E OCH3 "OCH321 of 42 Current Attempt in Progress A Propose an efficient synthesis for the given transformation. CI NaH F This transformation can be performed with some reagent or combination of the reagents listed below. Give the necessary reagent(s) in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. 1) MeMgBr; 2) H3O+ B ad]ล 1) O 2) H3O+ G CI Na, NH3 (1) C 1) 2) H3O+ -1/2 H MCPBA (RCO3H) D Mg I = 1) EtMgBr; 2) H3O+ с Fi OF Q Fill Qu Fill in Que Fill in
- How might you carry out the following selective transformations? (Note that a protection step may be required, and recall that aldehydes are more reactive than ketones toward nucleophilic addition.) Syntheses may require several steps. Choose the route with the fewest steps. Use letters from the table to list reagents in the order used (first at the left). Example: dag a b C d 1. excess NaBH4 2. H3O* 1. 1 eq. NaBH4 2. H3O* 1. LiAlH4 2. H30* aqueous HCI e f g Reagents 1. Li(CH3)2Cu 2. H3O+ 1. CH3MgBr / dry ether 2 H3O+ HOCH₂CH₂OH/HCI h i j Trimethylsilyl chloride / triethylamine CrO3/H3O+ Dess-Martin periodinane in CH₂Cl₂a) Ketoacid Z below can be synthesized from ethyl acetoacetate W via an acetoacetic ester synthesis. The B-ketoester W can be initially synthesized by Claisen condensation reaction of ester V. NaOEt NaOEt Base Ester V OEt CH,Br OEt | HO CH, Ketoacid Z i) Identify the structure of ester V. ii) Transformation of W to X and X to Y are alkylation reactions. Draw the structures of the intermediates X and Y. Determine a suitable base for the conversion of X to Y. iii) With regards to the formation of the ketoacid Z from Y, show the steps involved in the reaction by giving the appropriate intermediates, reagents and reaction conditions. iv) Explain why only one of the carbonyl groups in Y is lost as carbon dioxide gas.arrow pushing mechanism to illustrate the formation of t-butyl bromide from t-butanol and draw in the necessary intermediates and products formed. 41. Draw an CH3 H3C- OH H FotH CH3 H. Conjugate Acid Conjugate Base CH3 H3C CH3 carbocation t-butyl bromide H,O
- Using a Stork enamine synthesis, show how you might accomplish the following transformation: of The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF). If there is more than one correct solution, proide just one answer. A. В. CulLi D. H,O E. R2NH, [H'](-H,O) F. MgBr MacBook Air 900 F2 F3 %23 $ & 3 4 5 6 7 8 6. Q E R Y { P D G K V N H alt tion command command optionPropose an efficient synthesis for the following compound using an acetoacetic ester synthesis: ilov OEt The transformation above can be performed with some reagent or combination of the reagents listed below. Give the necessary reagents in the correct order, as a string of letters (without spaces or punctuation, such as "EBF"). If there is more than one correct solution, provide just one answer. A. NaOEt D. CH3CH₂Br B. E. H3O*, heat Br M F.CH3l G. BrPropose a plausible mechanism for the following transformation. of folo Step 1 Pyridine OH Correct. The first step (nucleophilic attack), requires two curved arrows, which show the phenol functioning as a nucleophile and attacking the electrophilic carbonyl group. Add curved arrow(s) to draw the first step of the mechanism. Modify the given drawings of the product as needed to show the intermediate that is formed in this step. Use the +/-tools to add/remove charges, and use the single bond tool to interconvert between double and single bonds.