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Draw out the machanism for the aldol condensation of (2E,6E)-2,6-bis(4-ethylbenzylidene)cyclohexanone.
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- Draw the product formed (after dehydration) in the crossed aldol condensation of phenylacetaldehyde (C6H5CH2CHO) with CH2(CO2Et)2 in the presence of sodium hydroxide.Draw out the machanism for the aldol condensation of (2E,6E)-2,6-bis(4-ethylbenzylidene)cyclohexanone. (the reaction between cyclohexanone and 4-methoxybenzaldehyde)Define Dehydration of the Aldol Product ?
- 5. In the transition state for the proline-catalyzed aldol addition, a hydrogen bond is shown between the carboxylic acid of proline and isobutyraldehyde. Explain how this could lower the energy barrier for the reaction.(b) Why is the Claisen-Schmidt reaction a special type of aldol condensation? one of the reactants does not have a β hydrogen one of the reactants is acetone the reaction is base-catalyzed one of the reactants does not have an α hydrogen (b) Aside from having a carboxylic acid functional group, salicylic acid also has which of the following functionality? aldehyde alcohol ester phenolDraw the structure of the aldol that will form when cyclohexanone reacts with one mole ofbenzaldehyde. What is the name of this compound?
- In an aldol condensation reaction, acetone and benzaldehyde are mixed in the presence of sodium hydroxide to produce dibenzalacetone. Does it matter whether the acetone is added first to the aq. NaOH solution then the benzaldehyde, or if the benzaldehyde is added first to the aq. NaOH solution, then the acetone? Explain2) Provide the structure of the two organic starting materials that are required to produce cinnamaldehyde (PhCH=CHCHO) via a crossed aldol condensation followed by dehydration?Draw the enone product of aldol self- condensation of benzaldehyde. If self- condensation fails, tell OWL by drawing ethane, CH3CH3.
- The intramolecular Aldol condensation of 2,6-heptanedione with base may produces two possible B-hydroxyl ketones as shown in the following reaction pathway. CH, (1) OH CH, (A) 3-Methyl-2-cyclohexenone CH, CH, (2) Он CH, 2,6-Heptanedione (B) Methyl(2-methyl-1-cyclobutenyl)ketone (i) Write detailed mechanisms for both the reactions (1) and (2).NH2 H+ 2. Br он internal aldol condensation 3. NaOEt, EtOH 4. NH2 5.In theory, the intramolecular aldol reaction of 6-oxoheptanal could yield the three compounds shown. It turns out, though, that 1-acetylcyclopentene is by far the major product. Why are the other two compounds formed in only minor amounts? Draw a stepwise mechanism to show how all three products are formed.