Homework Answers
carbonyl compounds undergoes the aldol condensation
reaction by the dehydration and forms the alpha beta unsaturated
carbonyl compounds
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Predict the products of the following aldol condensations. Show the products both before and after dehydration. (c)...
Predict the major products of the following crossed Claisen condensations. (Do not draw any aldol byproducts.)...
Predict the major products of the following crossed Claisen
condensations. (Do not draw any aldol byproducts.)
NaOCHẠCH CH,CH-C-CH2 + CH,CH,0-C-OCH.CH NaOCH CH3 CH, -C-CH,CH-C-OCH.CH
1. Predict the four possible Aldol condensation products and their dehydration products. in KOH, H20,4 2....
1. Predict the four possible Aldol condensation products and their dehydration products. in KOH, H20,4 2. Provide a mechanism for the following transformation. CH,CH, OK CH.CH,OH, heat 3. Predict all possible Claisen condensation products plus their decarboxylation products. ao 1. KOE 2.H.O. 3. heat wybos 4. Predict the product of the Dieckmann cyclization. 1. KOEI 2.H.0. 3. heat
Predict how many stereoisomeric aldol products will be produced in the following aldol addition. Draw the...
Predict how many stereoisomeric aldol products will be produced
in the following aldol addition. Draw the structures of all
the aldol products. Show all relevant sterochemistry.
NaoEVELOH aldol products 20 °C
What is the structure of the dehydration products of the self-aldol reaction for each of the...
What is the structure of the dehydration products of the
self-aldol reaction for each of the following compounds when
reacted with NaOH?
b) to) c) ah d)
Question 4 1 pts Aldol and Claisen condensations are prone to "mixed products." Which of the...
Question 4 1 pts Aldol and Claisen condensations are prone to "mixed products." Which of the following techniques can be used to help reduce the mixture of products one obtains in these reactions? O Make it so that one of the reagants does not have any "alpha protons." O Slowly add any reagants which you are concerned might readily self-react (react with themselves). O Heat the reaction up. OAll of the above. O 2 of the 3 above are correct.
3. Give the major organic aldol product for each reaction, along with the dehydration product (if...
3. Give the major organic aldol product for each reaction, along with the dehydration product (if possible) formed after heating. NaOH HO NaOH HO NaOH heat H2O 4. In the following reaction the aldol product C is difficult to isolate, and even without heating the dehydration product D is formed instead. Explain. ОН Ін 10-4 NaOH HO 5. Draw all possible aldol products from this mixed aldol reaction (not dehydrated). NaOH HO
Draw the structure of the major aldol product (prior to possible dehydration) of the following reaction...
Draw the structure of the major aldol product (prior to possible dehydration) of the following reaction (References] CHE + CH 5% NaOH 95% aq, ethanol. 30° Сн, н • You do not have to consider stereochemistry. If no reaction occurs, draw the organic starting material P opy C- 7 (
Show the starting materials needed to obtain the following products using Claisen condensations:
Show the starting materials needed to obtain the following products
using Claisen condensations:
predict the products from the dehydration with H2SO4/H2O of the following alcohols.
predict the products from the dehydration with
H2SO4/H2O of the following alcohols.
Predict the major products of dehydration catalyzed by sulfuric acid. If more than one diastereomer will...
Predict the major products of dehydration catalyzed by sulfuric acid. If more than one diastereomer will form, draw BOTH diastereomers. a. hexan-2-ol b. pentan-3-ol c. cyclopentylmethanol
Predict the major products of the following crossed Claisen
condensations. (Do not draw any aldol byproducts.)
NaOCHẠCH CH,CH-C-CH2 + CH,CH,0-C-OCH.CH NaOCH CH3 CH, -C-CH,CH-C-OCH.CH
1. Predict the four possible Aldol condensation products and their dehydration products. in KOH, H20,4 2. Provide a mechanism for the following transformation. CH,CH, OK CH.CH,OH, heat 3. Predict all possible Claisen condensation products plus their decarboxylation products. ao 1. KOE 2.H.O. 3. heat wybos 4. Predict the product of the Dieckmann cyclization. 1. KOEI 2.H.0. 3. heat
Predict how many stereoisomeric aldol products will be produced
in the following aldol addition. Draw the structures of all
the aldol products. Show all relevant sterochemistry.
NaoEVELOH aldol products 20 °C
What is the structure of the dehydration products of the
self-aldol reaction for each of the following compounds when
reacted with NaOH?
b) to) c) ah d)
Question 4 1 pts Aldol and Claisen condensations are prone to "mixed products." Which of the following techniques can be used to help reduce the mixture of products one obtains in these reactions? O Make it so that one of the reagants does not have any "alpha protons." O Slowly add any reagants which you are concerned might readily self-react (react with themselves). O Heat the reaction up. OAll of the above. O 2 of the 3 above are correct.
3. Give the major organic aldol product for each reaction, along with the dehydration product (if possible) formed after heating. NaOH HO NaOH HO NaOH heat H2O 4. In the following reaction the aldol product C is difficult to isolate, and even without heating the dehydration product D is formed instead. Explain. ОН Ін 10-4 NaOH HO 5. Draw all possible aldol products from this mixed aldol reaction (not dehydrated). NaOH HO
Draw the structure of the major aldol product (prior to possible dehydration) of the following reaction (References] CHE + CH 5% NaOH 95% aq, ethanol. 30° Сн, н • You do not have to consider stereochemistry. If no reaction occurs, draw the organic starting material P opy C- 7 (
Show the starting materials needed to obtain the following products
using Claisen condensations:
predict the products from the dehydration with
H2SO4/H2O of the following alcohols.
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