Why is it necessary to protect aniline as acetanilide before nitration?

I know u need to but why. Thanks

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    Lv 5
    1 decade ago
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    Nitration requires strong mixtures of nitric and other (usually sulfuric) acids.

    Acids quickly protonate the NH2 group of aniline and convert it to a NH3+ group, which is strongly deactivating.

    Also, a nitration mixture can oxidize the NH2 group, and convert it to a variety of oxidized products.

    If you protect the amino group as an amide, then it is no longer basic, and it is not easily oxidized.

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