JEE Main · 2022 · 28 Jul 2022 · Shift 1 · Hydrocarbons

Identify the major product A and B for the below given reaction sequence.

(A)(see structure)
(B)(see structure)✓ Correct
(C)(see structure)
(D)(see structure)

Answer: (B)

Solution

The reaction sequence involves elimination reactions. The first step with alcoholic KOH leads to E2 elimination forming an alkene. The second step with another base continues the elimination. The major products follow Saytzeff's rule (more substituted alkene is favored) or Hofmann's rule depending on the base and leaving group. Based on the reaction conditions and the structure, option (B) represents the correct major products A and B.

JEE Main · 2022 · 28 Jul 2022 · Shift 1 · Single correct option

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