Chapter 22: Q.69-G (page 1204)
Question: Predict the products of the following reactions
g.

Short Answer
Answer

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Chapter 22: Q.69-G (page 1204)
Question: Predict the products of the following reactions
g.

Answer

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The Knoevenagel condensation is a special case of the aldol condensation in which an active methylene compound reacts with an aldehyde or ketone, in the presence of a secondary amine as a basic catalyst, to produce a new C=C. Show the starting materials that made each of these by a Knoevenagel condensation.

Show how you would accomplish the following conversions in good yields. You may use any necessary reagents.

Write equations showing the expected products of the following enamine alkylation and acylation reactions. Then give the final products expected after hydrolysis of the iminium salts.
(a) pyrrolidine enamine of pentan-3-one + allyl chloride
(b) pyrrolidine enamine of acetophenone + butanoyl chloride
(c) piperidine enamine of cyclopentanone + methyl iodide
(d) piperidine enamine of cyclopentanone + methyl vinyl ketone
Question: Predict the products of the following reactions
b. 1phenylethanol + I2 excess
When propionaldehyde is warmed with sodium hydroxide, one of the products is 2-methylpent-2-enal. Propose a mechanism for this reaction.
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