This is an acid-catalyzed intramolecular cyclization reaction. The alkene undergoes protonation followed by nucleophilic attack by the hydroxyl group to form a five-membered cyclic ether (tetrahydrofuran derivative). The tertiary carbocation intermediate is stabilized, and the ring closure is favored due to the formation of a stable five-membered ring. The product is the substituted tetrahydrofuran shown in option (D).
JEE Advanced · 2014 · 25 May 2014 · Paper 2 · Single correct option
