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The major product of the following reaction is : Starting material: a fused bicyclic aromatic compound (tetralin-like ring system) treated with (i) Br₂ (ii) EtOH

1. Product (1): fused bicyclic ring with OEt substituent at the top carbon and a double bond in the right ring
2. Product (2): fused bicyclic ring with OEt substituent at the top carbon and Br substituent on the adjacent carbon
3. Product (3): fused bicyclic ring with OEt substituent at the top carbon and OEt substituent on the adjacent carbon
4. Product (4): fused bicyclic ring with Br substituent at the top carbon and OEt substituent on the adjacent carbon

Correct answer: Product (1): fused bicyclic ring with OEt substituent at the top carbon and a double bond in the right ring

Solution

The correct option is Product (1) because the reaction with Br₂ introduces a bromine atom, which can then be eliminated to form a double bond, while the subsequent treatment with EtOH leads to the substitution of the bromine with an ethoxy group (OEt) at the top carbon, resulting in the specified structure.

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