The major product obtained on the monobromina | vedclass

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Question

(B) The compound $A$ is $3$-methylanisole ($1$-methoxy-$3$-methylbenzene). In this molecule,the $-OCH_3$ group is a strong ortho/para-directing group,

Vedclass · Accepted Answer

$4-$bromo$-1-$methoxy$-3-$methylbenzene

Vedclass · Answer

(B) The compound $A$ is $3$-methylanisole ($1$-methoxy-$3$-methylbenzene). In this molecule,the $-OCH_3$ group is a strong ortho/para-directing group,while the $-CH_3$ group is a weakly ortho/para-directing group. The $-OCH_3$ group dominates the directing effect. Electrophilic substitution occurs at the positions ortho and para to the $-OCH_3$ group. The positions ortho to $-OCH_3$ are $2$ and $6$. Position $2$ is sterically hindered by the $-CH_3$ group at position $3$. The position para to $-OCH_3$ is position $4$. Substitution at position $4$ is favored due to less steric hindrance compared to position $2$. Thus,the major product is $4$-bromo-$1$-methoxy-$3$-methylbenzene.

The major product obtained on the monobromination (with $Br_2/FeBr_3$) of the following compound $A$ is

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