Q76 · CSIR-NET Chemistry, June 2015
Paper: CSIR-NET June 2015 · Subject: Organic Chemistry · Chapter: Pericyclic Reactions · Topic: Pericyclic Reactions – General · Marks: 2 · Difficulty: Medium
The major product formed in the following reaction is 
(a)
(b)
(c)
(d)
Answer
Answer: A ✓ checked by 4AB · confidence medium
Explanation
Intramolecular thermal ene reaction: the terminal alkene is the enophile and the internal alkene with its allylic H is the ene. It closes a six-membered ring carrying vicinal methyl and vinyl groups (a).
Study loop for Pericyclic Reactions