JEE MAIN - Chemistry (2019 - 8th April Evening Slot - No. 2)
Polysubstitution is a major drawback in:
Reimer Tiemann reaction
Friedel Craft's alkylation
Acetylation of aniline
Friedel Craft's acylation
Explanation
Polysubstitution is a major drawback of Friedal–Craft alkylation.
–CH3 group in highly activating group due to +H effect, so after first time addition of -CH3 group in benzene ring the reactivity of the benzene ring increases.
–CH3 group in highly activating group due to +H effect, so after first time addition of -CH3 group in benzene ring the reactivity of the benzene ring increases.
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