Advertisements
Advertisements
Question
Write a short note on the following:
Gabriel phthalimide synthesis
Advertisements
Solution
Gabriel synthesis is used for the preparation of primary amines. Phthalimide, on treatment with ethanolic potassium hydroxide, forms potassium salt of phthalimide, which on heating with alkyl halide followed by alkaline hydrolysis, produces the corresponding primary amine. Aromatic primary amines cannot be prepared by this method because aryl halides do not undergo nucleophilic substitution with the anion formed by phthalimide.


RELATED QUESTIONS
Give reasons for the following:
CH3NH2 is more basis than C6H5NH2.
Choose the most correct option.
The hybridisation of nitrogen in primary amine is ____________.
Isobutylamine is an example of ______.
Choose the most correct option.
Which type of amine does produce N2 when treated with HNO2?
Choose the most correct option.
Carbylamine test is given by ____________.
Choose the most correct option.
Identify ‘B’ in the following reactions
\[\ce{CH3 - C ≡ N ->[Na/C2H5OH] A ->[NaNO2/dilHCl]B}\]
What are amines?
How are amines classified depending on the functional group? Give one example of each class of amines.
A tertiary amine is an organic compound ____________.
Which of the following amines is most basic in nature in aqueous phase?
\[\ce{Aniline + benzoylchloride ->[NaOH] C6H5 - NH - COC6H5}\] this reaction is known as ____________.
When aniline reacts with acetic anhydride the product formed is ____________.
How will you convert nitrobenzene into m-nitro aniline?
Write a short note on the following.
Ammonolysis
How will you distinguish between primary secondary and tertiary aliphatic amines?
Account for the following.
pKb of aniline is more than that of methylamine.
Account for the following.
Gabriel phthalimide synthesis is preferred for synthesising primary amines.
Arrange the following.
In decreasing order of basic strength
![]()
How will you prepare propan-1-amine from butane nitrile?
How will you prepare propan-1-amine from propanamide?
How will you convert diethylamine into N-nitrosodiethylamine?
Assertion A: Aniline on nitration yields ortho, meta and para nitro derivatives of aniline.
Reason R: Nitrating mixture is a storng acidic mixture.
In the light of the above statements, choose the correct answer from the options given below:
Write short note on the following:
Ammonolysis
Name the distinguishing test for differentiating 1° amine from 2° and 3° amine.
Define Amines.
Write a short note on the following
Ammonolysis
Write a short note on the following.
Ammonolysis
Write short note on Ammonolysis.
