Question

The major product formed in the following reaction
|
is

• A.
• B.
• C.
• D.

Answer 1

The Correct Option is B

The reaction sequence involves a nucleophilic substitution followed by an electrophilic addition:

1. sec-BuLi (sec-butyllithium) acts as a base, deprotonating the thiol group in the initial structure.
2. The phenyl group (Ph) attaches to the deprotonated site via the bromine atom (Br), forming an alkylated intermediate.
3. The intermediate undergoes a reaction with mercury sulfate (HgSO₄) and aqueous sulfuric acid (H₂SO₄), facilitating the formation of a carbocation.
4. Finally, in the presence of methanol (MeOH) and BF₃·Et₂O, an ether (OCH₃) group is added to the carbocation site, completing the transformation.