In the following reaction, [X] the major product [X] is: · ABC26OR0572
Subject: Organic Chemistry · Chapter: Pericyclic Reactions · Topic: Pericyclic Reactions – General · Exam: GATE 2000-2022 · Marks: 2 · Difficulty: Medium
In the following reaction, 
$[\mathrm{X}]$ the major product $[\mathrm{X}]$ is:
$[\mathrm{X}]$ the major product $[\mathrm{X}]$ is:(a)
(b)
(c)
(d)
Answer
Answer: B ✓ checked by 4AB · confidence high
The source book printed A; on checking, B is correct — see the explanation.
Explanation
Carroll rearrangement: the allylic acetoacetate undergoes a [3,3] shift with allylic transposition and loses CO₂, giving the γ,δ-unsaturated ketone Et–CH=CH–CH(Me)–CH₂COMe (b).
Study loop for Pericyclic Reactions