Q.8.

Question

Question: Draw the products formed in the crossed aldol reaction of phenylacetaldehyde $(C_{6} H_{5} C H_{2} C H O)$ with each compound: (a) $C H_{2} {(C O O E t)}_{2}$ ; (b) $C H_{2} {(C O C H_{3})}_{2}$ ; (c) $C H_{3} C O C H_{2} C N$ .

Step-by-Step Solution

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Answer

Answer

1Step 1: Crossed aldol reaction

Aldol reaction carried out using two different (non-identical) carbonyl compounds is referred to as the crossed aldol reaction.

2Step 2: Crossed aldol reaction mechanism

A crossed-aldol reaction is shown below.

Crossed aldol reaction

3Step 3: Products formed in a crossed aldol reaction

a. The reaction of $C_{6} H_{5} C H_{2} C H O$ with $C H_{2} {(C O O E t)}_{2}$ is represented below:

Reaction of phenyl acetaldehyde with $C H_{2} {(C O O E t)}_{2}$

b. The reaction of $C_{6} H_{5} C H_{2} C H O$ with $C H_{2} {(C O C H_{3})}_{2}$ is represented below:

Reaction of phenyl acetaldehyde with $C H_{2} {(C O C H_{3})}_{2}$

c. The reaction of $C_{6} H_{5} C H_{2} C H O$ with $C H_{3} C O C H_{2} C N$ is represented below:

Reaction of phenyl acetaldehyde with $C H_{3} C O C H_{2} C N$

Q.7.

Q.9.

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