5. Give the products for the following aldol reactions.
6. Cinnamaldehyde can be synthesized by a mixed aldol condensation reaction. Show the starting materials you would use and write out the reaction mechanism.
Homework Answers
3. Draw all the aldol addition products that are formed when a mixture of acetaldehyde and...
3. Draw all the aldol addition products that are formed when a
mixture of acetaldehyde and pentanal is treated with aqueous sodium
hydroxide.
4. A reaction, such as described in question 3, which produces a
mixture of products is generally not useful for organic synthesis.
Suggest a change in the reaction starting materials for question 3
that would produce a single, similar product.
5. Draw a generic mechanism for aldol condensation.
6. The last step for an aldol condensation involves...
Postlab Assignment for Minilab 34 “Preparation of Aldol Condensation Produ...
Postlab Assignment for Minilab 34 “Preparation of Aldol Condensation Products” 1. Explain why benzaldehyde is expected to be the most reactive aldehyde among the three aldehydes used in this experiment. (used benzaldehyde, 4-methylbenzaldehyde, and 4-methoxybenzaldehyde) 2. What is the role of aqueous NaOH used in the experiment you carried out? 3. How would you change the procedures in this experiment if you wished to synthesize benzalacetophenone (C6H5CH=CHCOC6H5). Just indicate the two main organic starting materials. 4. Write a mechanism for...
Provide the reactants that would give the following aldol condensation products Predict the major product or...
Provide the reactants that would give the following aldol
condensation products
Predict the major product or provide the missing reagent for the following Claisen Condensation reactions
5. Give the products of the following reactions. You DO NOT need to show a detailed mechanism but...
5. Give the products of the following reactions. You DO NOT need to show a detailed mechanism but do show ALL reaction intermediates. (30 pts) LiAIH4 G CH3-C-00HE (b) F (c) OH CH3 6. Give the product of the following reactions and in each case give a detailed reaction mechanism by which it is formed. (40 pts, 10 each) pH 4-5 ca. H2S4 HBrJ (c)--/SH NaOH I (d) H CH3 H CH3
5. Give the products of the following reactions....
1. Provide the detailed mechanism of the aldol condensation reaction between 2 mols of benzaldehyde and...
1. Provide the detailed mechanism of the aldol condensation reaction between 2 mols of benzaldehyde and 1 mol of acetone under basic conditions. Show all intermediates and steps for full credit. There are 10 steps to the complete mechanism. (2 pts for each step) 2. Give the products for the following aldol reactions. (5 points each) مل OH H 2. н 3. OH ܘܐ OH o 5. ОН" -CHO 6. OH
How to solve question 2 to question 5. 2. Why does the mixed aldol condensation, producing...
How to solve question 2 to question 5.
2. Why does the mixed aldol condensation, producing benzalacetophenone is the main reaction in this experiment and NOT both other possible reactions; acetophenone condensation and Cannizzaro benzaladehyde reaction? 3. Propose a reason to explain the statement that the trans-benzalacctophenone isomer is the major product in aldol condensation 4, Explain why the main product from the bromine addition to the trans-acetophenone is crythro-dibromide 5. Write a mechanism for the addition of aniline to...
Give all possible products from the following mixed aldol reaction and show how they can be...
Give all possible products from the following mixed aldol reaction and show how they can be formed. 0 H Н,О н
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in...
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide Provide the expected major MIXED aldol condensation product for this reaction (can exist as E or Z isomer so you can draw either) b) Would you have to heat the reaction mixture in order for the reaction to form the aldol condensation product? Why or wh y not? 2) Consider the mixed aldol condensation reaction of 3,3-dimethyl-2-butanone (shown in...
2. Give the products for the following aldol reactions. (5 points each) 1. Д. ОН Н...
2. Give the products for the following aldol reactions. (5 points each) 1. Д. ОН Н 2. Нt 3. ОН- гру. ".. ОН: 5. ОН: -CHO 6. “ ОН:
2. Give the products for the following aldol reactions. (5 points each) Д. ОН" 2. H...
2. Give the products for the following aldol reactions. (5 points each) Д. ОН" 2. H . 3. ОН но Н он H ОН -CHO 6. ОН
3. Draw all the aldol addition products that are formed when a
mixture of acetaldehyde and pentanal is treated with aqueous sodium
hydroxide.
4. A reaction, such as described in question 3, which produces a
mixture of products is generally not useful for organic synthesis.
Suggest a change in the reaction starting materials for question 3
that would produce a single, similar product.
5. Draw a generic mechanism for aldol condensation.
6. The last step for an aldol condensation involves...
Provide the reactants that would give the following aldol
condensation products
Predict the major product or provide the missing reagent for the following Claisen Condensation reactions
5. Give the products of the following reactions. You DO NOT need to show a detailed mechanism but do show ALL reaction intermediates. (30 pts) LiAIH4 G CH3-C-00HE (b) F (c) OH CH3 6. Give the product of the following reactions and in each case give a detailed reaction mechanism by which it is formed. (40 pts, 10 each) pH 4-5 ca. H2S4 HBrJ (c)--/SH NaOH I (d) H CH3 H CH3
5. Give the products of the following reactions....
1. Provide the detailed mechanism of the aldol condensation reaction between 2 mols of benzaldehyde and 1 mol of acetone under basic conditions. Show all intermediates and steps for full credit. There are 10 steps to the complete mechanism. (2 pts for each step) 2. Give the products for the following aldol reactions. (5 points each) مل OH H 2. н 3. OH ܘܐ OH o 5. ОН" -CHO 6. OH
How to solve question 2 to question 5.
2. Why does the mixed aldol condensation, producing benzalacetophenone is the main reaction in this experiment and NOT both other possible reactions; acetophenone condensation and Cannizzaro benzaladehyde reaction? 3. Propose a reason to explain the statement that the trans-benzalacctophenone isomer is the major product in aldol condensation 4, Explain why the main product from the bromine addition to the trans-acetophenone is crythro-dibromide 5. Write a mechanism for the addition of aniline to...
Give all possible products from the following mixed aldol reaction and show how they can be formed. 0 H Н,О н
la) Consider the mixed aldol condensation reaction of 1-methylcyclopentane-1-carbaldehyde (shown below) and 3,3-dimethyl-2-butanone (shown below) in the presence of sodium hydroxide Provide the expected major MIXED aldol condensation product for this reaction (can exist as E or Z isomer so you can draw either) b) Would you have to heat the reaction mixture in order for the reaction to form the aldol condensation product? Why or wh y not? 2) Consider the mixed aldol condensation reaction of 3,3-dimethyl-2-butanone (shown in...
2. Give the products for the following aldol reactions. (5 points each) 1. Д. ОН Н 2. Нt 3. ОН- гру. ".. ОН: 5. ОН: -CHO 6. “ ОН:
2. Give the products for the following aldol reactions. (5 points each) Д. ОН" 2. H . 3. ОН но Н он H ОН -CHO 6. ОН
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