Q54 · CSIR NET Chemistry, June 2016
Paper: CSIR NET June 2016 · Subject: Organic Chemistry · Chapter: Pericyclic Reactions · Topic: Pericyclic Reactions – General · Marks: 2 · Difficulty: Medium
The major products A and B formed in the following reaction sequence are 
$+$ 
heat 
(A) $h
u$ 
(B)
$+$ heat (A) $h
u$ (B)(a)$mathrm{A}=$ 
$mathrm{B}=$ 
$mathrm{B}=$ (b)$mathrm{A}=$ $mathrm{B}=$ 
$mathrm{B}=$ (c)$mathrm{A}=$ 
$mathrm{B}=$ 
$mathrm{B}=$ (d)$mathrm{A}=$ 
$mathrm{B}=$ 
$mathrm{B}=$ Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
The Diels–Alder adduct of cyclopentadiene and phenyl vinyl sulfoxide loses PhSOH (syn elimination), giving norbornadiene (A). Irradiation gives quadricyclane (B) (c).
Study loop for Pericyclic Reactions