Q: Which is a reasonable intermediate in an aldol reaction of propanal? HO
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Q: Draw the structure of the major aldol product (prior to possible dehydration) of the following…
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Q: Draw the products formed in the crossed aldol reaction of phenylacetaldehyde (C6H5CH2CHO) with each…
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Q: Show how to prepare each a,B-unsaturated aldehyde condensation. or ketone by an aldol
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Q: Show how to prepare a,b-unsaturated aldehyde by an aldol reaction followed by dehydration of the…
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A: These are example of nucleophilic addition reaction
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- O Answer (d) QUESTION 6 Which one of the following compounds does not undergo an aldol reaction with itself when treated with NaOEt in EtOH? H. (a) (b) (c) CH3 (d) (cH); C H. O Answer (a) O Answer (b) O Answer (c) O Answer (d) QUESTION 7 What is the major organic product after the following two reaction steps ?Give the IUPAC name of the two carbonyl compounds reacted together to synthesize compound A, given below, by a crossed aldol condensation followed by dehydration. || CH3CCH=CH₂2 A(a) 11. (b) What is the major product of the elimiation below? |||-- EtONa EtOH (C) (d)
- SP asuno Answer (d) QUESTION 5 The introduction of one of the following substituents to a benzene ring through diazonium salt substitution does not require a copper salt. What is the identity of that substituent? (a) I (b) Br (c) CI (d) CN O Answer (a) Answer (b) OAnswer (c) Answer (d) QUESTION 6 Which one of the following compounds does not undergo an aldol reaction with itself when treated with NaOEt in EtOH? O O O O) Cinnamaldehyde is used in artificial cinnamon flavoring. Show how cinnamaldehydeis synthesized by a crossed aldol condensation followed by dehydration.H CHcinnamaldehyde C COH(b) Adding acetophenone slowly to a cold solution of LDA produces the enolate of acetophenone; but adding LDA slowly to a cold solution of acetophenone produces acondensation product. Show the reactions happening in each case, and explain why weobserve such different results• Using aldol or crossed aldol condensation, suggest a synthesis of the following compounds: a b مليمت H3C H3C CH3 H3C ge H Saved
- Draw the product formed when phenylacetic acid (C6H5CH2COOH) istreated with following reagent. With some reagents, no reaction occurs. [1] SOCl2; [2] CH3CH2CH2NH2 (excess)Which structure is an intermediate in the base catalyzed tautomerization of the below enol to its keto form? The correct answer is C but please explain why.18) What two organic starting materials are required to produce cinnamaldehyde (PhCH=CHCHO) via a crossed aldol condensation followed by dehydration? A) PhCH3 and CH3CHO B) PhCHO and CH3CHO C) PhCHO and CH3CH2CHO D) PhCHO and CH3CH₂OH b
- Orsellinic acid, a common constituent of lichens, is synthesized from the condensation of acetyl thioester and malonyl thioester. If a lichen is grown on a medium containing acetate that was radioactively labeled with 14C at the carbonyl carbon, which carbons will be labeled in orsellinic acid?Which compound is a major product of the reaction sequence shown (1) Li, NH3, -35°C A (2) mcРBA/CH,сЬ OH D HO- OCompound B )Compound A Compound DWhen 3,7-nonadione is treated with NaOH base, it produces the enolate shown. What is the final product of this intramolecular aldol condensation (after dehydration)? i The final product is: A) B) C) D) & & & & NaOH