Question
In the following reaction the major product [X] is
The correct answer is
The reaction sequence given involves multiple steps that are common in organic synthesis. Let's analyze each step one by one:
- Oxidation with SeO_2: The first step involves the oxidation of a methyl group to form a hydroxyl group. Selenium dioxide (SeO_2) in the presence of acetic acid (HOAc) is a reagent known for allylic oxidation. It typically converts an allylic hydrogen into an allylic hydroxyl group.
- Aldol Condensation: The second step uses NaOH, which suggests an aldol condensation reaction. The newly formed hydroxyl group can undergo condensation to form a double bond with the adjacent carbonyl group.
- Acidic Workup: The final step using H_3O^+ (acidic conditions) neutralizes the reaction and completes the dehydration process.
Thus, the sequence of reactions transforms the starting compound to the major product, which is a conjugated cyclic diene.
The correct major product is represented by the following structure:
This choice corresponds to the correct transformation as per the reaction conditions provided.
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Important Questions from Organic Transformations
The major product formed in the following reaction sequence is
The major product formed in the following reaction sequence is
The major products X and Y in the following reaction sequence are
The following conversion is an example of
The major product formed in the reaction given below is
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