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Question
Give reasons for the following observation:
Aniline is acetylated before nitration reaction.
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Solution
Aniline is acetylated, before the nitration reaction in order to avoid the formation of tarry oxidation products and protect the amino group, so that p-nitro derivative can be obtained as major product.
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RELATED QUESTIONS
Write the structures of main products when aniline reacts with the following reagents :
Br2 water
Account for the following:
Although the amino group is o, p-directing in aromatic electrophilic substitution reactions, aniline on nitration gives a substantial amount of m-nitroaniline.
Write short notes on acetylation.
What is the action of the following reagents on aniline?
Acetic anhydride
Illustrate the following reactions giving suitable example in each case
Acetylation of amines
How will you convert the following?
Aniline into N−phenylethanamide
Assertion: N, N-Diethylbenzene sulphonamide is insoluble in alkali.
Reason: Sulphonyl group attached to nitrogen atom is strong electron-withdrawing group.
When bromination of aniline is carried out by protecting – NH2. The major product is
How can the activating effect of the −NH2 group in aniline be controlled?
Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.
Reason (R): Carboxyl group increases the electron density at the meta position.
