Textbook Question
Predict the products from crossed Claisen condensation of the following pairs of esters. Indicate which combinations are poor choices for crossed Claisen condensations.
(a)
(b)
25. Condensation Chemistry
Claisen Condensation
Back25. Condensation Chemistry
Claisen Condensation
- Textbook Question
Predict the products from crossed Claisen condensation of the following pairs of esters. Indicate which combinations are poor choices for crossed Claisen condensations.
(c)
(d)
- Textbook Question
Show how you would use an aldol, Claisen, or another type of condensation to make each compound.
(d)
- Textbook Question
Write the mechanism for the reaction of a 1,7-diester with an alkoxide ion to form a cyclic b-keto ester.
- Textbook Question
Draw the products of the following reactions:
d. diethyl 1,2-benzenedicarboxylate + sodium ethoxide: (1) slow addition of ethyl acetate; (2) HCl
- Textbook Question
Show how crossed Claisen condensations could be used to prepare the following esters.
(a)
- Textbook Question
Show how crossed Claisen condensations could be used to prepare the following esters.
(b)
- Textbook Question
Show how Claisen condensations could be used to make the following compounds.
(a)
- Textbook Question
Show how Claisen condensations could be used to make the following compounds.
(b)
- Textbook Question
Show how Claisen condensations could be used to make the following compounds.
(c)
- Textbook Question
Show how Claisen condensations could be used to make the following compounds.
(d)
- Textbook Question
Predict the products of the following Claisen condensations.
(a)
(b)
- Textbook Question
There are other condensation reactions similar to the aldol and Claisen condensations:
a. The Perkin condensation is the condensation of an aromatic aldehyde and acetic anhydride. Draw the product obtained from the following Perkin condensation:
- Textbook Question
What product is obtained when the product of a Knoevenagel condensation is heated in an aqueous acidic solution?
- Textbook Question
There are other condensation reactions similar to the aldol and Claisen condensations:
c. The Knoevenagel condensation is the condensation of an aldehyde or a ketone that has no a-hydrogens and a compound such as diethyl malonate that has an a-carbon flanked by two electron-withdrawing groups. Draw the product obtained from the following Knoevenagel condensation: