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प्रश्न
Write a short note on the following:
Gabriel phthalimide synthesis
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उत्तर
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.
संबंधित प्रश्न
Classify the following amine as primary, secondary or tertiary:
(C2H5)2NH
In the following
The compound ‘B’ is _______.
(A) Propan–1–amine
(B) Propan–2–amine
(C) Isopropylamine
(D) Dimethylamine
Choose the most correct option.
Identify ‘B’ in the following reactions
\[\ce{CH3 - C ≡ N ->[Na/C2H5OH] A ->[NaNO2/dilHCl]B}\]
Which of the following amines is most basic in nature in aqueous phase?
The order of basic strength for methyl substituted amines in aqueous solution is ____________.
Which one of the following is most basic?
How will you convert nitrobenzene into m-nitro aniline?
How will you distinguish between primary secondary and tertiary aliphatic amines?
Arrange the following.
In increasing order of boiling point C6H5OH, (CH3)2NH, C2H5NH2.
Arrange the following.
Increasing order of basic strength C6H5NH2, C6H5N(CH3)2, (C2H5)2NH and CH3NH2.
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 prepare propan-1-amine from 1-nitropropane?
Complete the following reaction.
The amine formed from an amide by mean of bromine and alkali has how many number of carbon atoms?
\[\begin{array}{cc}
\ce{O}\phantom{.........}\\
||\phantom{.........}\\
\ce{H - \underset{(A)}{C} - NH - CH3}
\end{array}\]
and
\[\begin{array}{cc}
\ce{O}\\
||\\
\ce{CH3 - \underset{(B)}{C} - NH2}
\end{array}\]
are which type of isomers?
Classify the following amine as primary, secondary or tertiary:
Classify the following amine as primary, secondary or tertiary:
Classify the following amine as primary, secondary or tertiary:
(C2H5)2CHNH2
Arrange the increasing order of solubility in water.
\[\ce{C2H5Cl, C2H5NH2, C2H5OH}\]
Write a short note on the following.
Ammonolysis
Write short note on the following.
Ammonolysis
Define Amines.
Account for the following:
Aniline does not undergo Friedel-Crafts reaction.
Write short note on the following.
Ammonolysis
Write short note on Ammonolysis.
