Given these, the total number of intrammolecular aldol condensation products formed from Y is: 1.03 1. NaOH Y 2. Zn, H2O 2. heat а. 1 b. 2 с. 3 d. 4
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- 17). What is the product of the following Acetoacetic Ester Synthesis? glan gem (A) OH OEt 1). 1 eqiv. NaOEt 2). 1 equiv. CH3CH₂Br (B) CH3 (C) .OH CH3 3). H3O+, then Heat (D) (E) OEt HO OEtIn an aldol condensation where cyclopentanone reacts 1:1 with Ortho- methoxybenzaldehyde. How many signals would appear in an HNMR for the condensation product? а. 9. o b. 7 С. 10 d. 11 O . 8Which of the following pairs will give two cross-aldol products? and H. (H3C)3C H. and H. H TH. CHO and TH. and H. H.
- The reaction of 2,7-octanedione with sodium hydroxide the reaction would be an example of Intramolecular Aldol Condensation Intermolecular Aldol Condensation Acid Catalyzed reaction Limiting reagent problem give both answer asap thanks O O a. NaCl b. NaOH c. LiAlH4 d. EtOH Intermolecular Aldol Condensation Intramolecular Aldol Condensation Robinsol Annulation Claisen CondensationA 4. What is the major product of the following intramolecular aldol condensation reaction? NaOH H20 (dehydration) A C D 3What is the expected product A for the following crossed aldol reaction? Note, formation of the enolate is carried out under irreversible conditions. 1. LDA, THF, -78 °C H3C. CH3 H. 3. H,O 工 2.
- 2. Explain the relative rates of hydrolysis for these acetals: Д Меооме 105 : 119.What is the aldol condensation product for the following reaction? NaOH H,O, A OH OH II IV V a. I d. IV b. II e. V c. III REF: 18.5UBL An attempt at preparing compound 7 using a crossed aldol reaction between starting materials L and M resulted instead in a mixture of 7 and 8, as depicted in the scheme om below. nollsmolnos [Aman E] uboravitual aldol reaction OH O vaiden of on olo ole 8 7 (i) Propose structures for L and M. (ii) Which reagent or reagents are needed for the reaction? bauoqme(iii) Draw a curved arrow mechanism for the formation of compound 7. obieno (iv) What would you change in the experiment to ensure complete formation of 7?
- E. J. Corey used the following reaction in a synthesis of thromboxane B2. Draw the product of step 3. 1. LDA, THF, -25°C 2. S S. 3. Н2О / THF Draw all enolates in their carbanion form. You do not have to consider stereochemistry. C P opy aste20. Provide the reactants and reaction conditions necessary for the following transformations. Stereochemistry and regiochemistry may be important. a. b. C. d. type: Oxidative cleavage type: Fisher esterification type: Acetal formation type: Aldol condensation TSOH OH + CO2 + H2O & volon37. Which of the following can undergo aldol condensation reaction: I. CH-CH-ОH I. СН-СНО II. CH--CHCHO IV. CH-CH-CH-CНО A. II and III B. III and IV C. II only D. II and IV