(i) Identify the alpha protons in ethyl acetoacetate (shown below) and draw the structures of the two different enolates which would form under basic conditions. Explain why one enolate is more stable than the other. OEt Ethyl acetoacetate
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- Draw the products formed in the crossed aldol reaction of phenylacetaldehyde (C6H5CH2CHO) with each compound: (a) CH2(COOEt)2; (b) CH2(COCH3)2; (c) CH3COCH2CN.) 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(ii) Draw the structure of the product N formed in the crossed aldol reaction between ketone L and aldehyde M (no mechanism required). L + H M NO₂ NaOH H₂O/EtOH N C15H14NO4
- Help me18en the folbwng sequence of reac ond what wo structure of compound AT D (CH,,CULI 2) H,0 HN-CH, H,0 Select one 2.Wnchufthfollewine.comectly represert eet the stepm the rechnsnetamad altalcardensation reactDraw the structures A, B and C for the reaction sequence below. Dehydration via an E1cb mechanism Michael Reaction Intramolecular Aldol Reaction A В КОН /ETOH / heat C КОН /ETOH КОН /ETOH
- • Using aldol or crossed aldol condensation, suggest a synthesis of the following compounds: a b مليمت H3C H3C CH3 H3C ge H SavedWhich carbonyl compounds do not undergo an aldol reaction when treated with OH in H2O?D) 2) 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 CH3CH2CHO C) PHCHO and CH3CH2OH D) PHCHO and CH3CHO uart "nolizable ketone to its enolate
- ) Cinnamaldehyde is used in artificial cinnamon flavoring. Show how cinnamaldehydeis synthesized by a crossed aldol condensation followed by dehydration.Draw the product formed (after dehydration) in the crossed aldol condensation of phenylacetaldehyde (C6H5CH2CHO) with CH2(CO2Et)2 in the presence of sodium hydroxide.The Stork reaction is a condensation reaction between an enamine donor and an a,ẞ-unsaturated carbonyl acceptor. The overall reaction consists of a three-step sequence of 1. formation of an enamine from a ketone. 2. Michael addition to an α,ß-unsaturated carbonyl compound, and 3. hydrolysis of the enamine in dilute acid to regenerate the ketone. Consider the Stork reaction between cyclohexanone and propenal. Draw the structure of the product of the enamine formed between cyclohexanone and dimethylamine. ચર્ચ F Correct HC, CH3 ChemDoodle 2 Draw the structure of the Michael addition product. ChemDoodle Jn (F 106 Correct