Chapter 23: Q43E (page 783)
The following reaction involves an intramolecular aldol reaction followed by a retroaldol-like reaction. Write both steps, and show their mechanisms.

Short Answer
The product is formed by aldol reaction.
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Chapter 23: Q43E (page 783)
The following reaction involves an intramolecular aldol reaction followed by a retroaldol-like reaction. Write both steps, and show their mechanisms.

The product is formed by aldol reaction.
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What ketones or aldehydes might the following enones have been prepared from by aldol reaction?

Which of the following compounds are aldol condensation products? What is the aldehyde or ketone precursor of each?
(a) 2-Hydroxy-2-methylpentanal (b) 5-Ethyl-4-methyl-4-hepten-3-one
The following reaction involves an intramolecular Michael reaction followed by an intramolecular aldol reaction. Write both steps, and show their mechanisms.

How might the following compounds be prepared using Michael reactions? Show the nucleophilic donor and the electrophilic acceptor in each case.

What condensation products would you expect to obtain by treatment of the following substances with sodium ethoxide in ethanol?
(a)Ethyl butanoate
(b)Cycloheptanone
(c)3,7-Nonanedione
(d)3-Phenylpropanal
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