a) CH3CO2Et + CH3CH2CO2Et
Interpretation:
The structures of the possible products, indicating predominant product if any, when ethylacetate and ethyl propionate undergo Claisen condensation reaction are to be given.
Concept introduction:
The Claisen condensation reaction involves a reversible condensation between two molecules of an ester that has α-hydrogen atoms in the presence of one equivalent of a base like sodium ethoxide. The product obtained is a β-keto ester. In the reaction an alcohol molecule is eliminated and the product has an acyl group of one of the reactant molecule attached to the α-carbon of the second molecule.
To give:
The structures of the possible products, indicating predominant product if any, when ethylacetate and ethyl propionate undergo Claisen condensation reaction.
b) C6H5CO2Et + C6H5CH2CO2Et
Interpretation:
The structures of the possible products, indicating predominant product if any, when ethylbenzoyate and ethylphenylacetate undergo Claisen condensation reaction are to be given.
Concept introduction:
The Claisen condensation reaction involves a reversible condensation between two molecules of an ester that has α-hydrogen atoms in the presence of one equivalent of a base like sodium ethoxide. The product obtained is a β-keto ester. In the reaction an alcohol molecule is eliminated and the product has an acyl group of one of the reactant molecule attached to the α-carbon of the second molecule.
To give:
The structure of the possible product, indicating predominant product if any, when ethylbenzoyate and ethylphenylacetate undergo Claisen condensation reaction.
c) EtOCO2Et + cyclohexanone
Interpretation:
The structures of the possible products, indicating predominant product if any, when ethoxyethylformate and cyclohexanone undergo Claisen condensation reaction are to be given.
Concept introduction:
The Claisen condensation reaction involves a reversible condensation between two molecules of an ester that has α-hydrogen atoms in the presence of one equivalent of a base like sodium ethoxide. The product obtained is a β-keto ester. In the reaction an alcohol molecule is eliminated and the product has an acyl group of one of the reactant molecule attached to the α-carbon of the second molecule.
To give:
The structures of the possible products, indicating predominant product if any, when ethoxyethylformate and cyclohexanone undergo Claisen condensation reaction.
d) C6H5CHO + CH3CH2Et
Interpretation:
The structures of the possible products, indicating predominant product if any, when benzaldehyde and ethylformate undergo Claisen condensation reaction are to be given.
Concept introduction:
The Claisen condensation reaction involves a reversible condensation between two molecules of an ester that has α-hydrogen atoms in the presence of one equivalent of a base like sodium ethoxide. The product obtained is a β-keto ester. In the reaction an alcohol molecule is eliminated and the product has an acyl group of one of the reactant molecule attached to the α-carbon of the second molecule.
To give:
The structures of the possible products, indicating predominant product if any, when benzaldehyde and ethylacetate undergo Claisen condensation reaction.
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Chapter 23 Solutions
Organic Chemistry
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- %Reflectance 95 90- 85 22 00 89 60 55 50 70 65 75 80 50- 45 40 WA 35 30- 25 20- 4000 3500 Date: Thu Feb 06 17:21:21 2025 (GMT-05:0(UnknownD Scans: 8 Resolution: 2.000 3000 2500 Wavenumbers (cm-1) 100- 2981.77 1734.25 2000 1500 1000 1372.09 1108.01 2359.09 1469.82 1181.94 1145.20 1017.01 958.45 886.97 820.49 668.25 630.05 611.37arrow_forwardNonearrow_forwardCH3 CH H3C CH3 H OH H3C- -OCH2CH3 H3C H -OCH3 For each of the above compounds, do the following: 1. List the wave numbers of all the IR bands in the 1350-4000 cm-1 region. For each one, state what bond or group it represents. 2. Label equivalent sets of protons with lower-case letters. Then, for each 1H NMR signal, give the 8 value, the type of splitting (singlet, doublet etc.), and the number protons it represents. of letter δ value splitting # of protons 3. Redraw the compound and label equivalent sets of carbons with lower-case letters. Then for each set of carbons give the 5 value and # of carbons it represents. letter δ value # of carbonsarrow_forward
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Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks Cole