Which of the following methods of preparing of amines will give some number of carbon atoms in the chain of amines as in the reactant?

Options

A. Reaction of nitrite with `LiAlH_(4)`
B. Reaction of amide with `LiAlH_(4)` followed by treatment with water
C. Heating alkylhalide with potassium salt of phthalimide followed by hydrolysis
D. Treatment of amide with bromine in aqueous solution of sodium hydroxide.

Answer

A, B, C

Explanation

Aliphatic and arylakyl primary amines can be easily prepared by the reduciton of the corresponding nitriles with `LiAlH_(4)`
`underset("Alkynitrile")(R-C)-= or underset("Arynitrile")(Ar-c)-=Nto LiAlH_(4) underset(1^(@)"amine")(RCH_(2) NH_(2)or ArCH_(2)NH_(2))`
Heating alkyl halide with Primart, seconday and tertiary amine can be prepared by reduciton of `LiAlH_(4)` followed by treatment with water. `underset(1^(@)"amide")(R=CONH_(2)) underset((ii)H_(2)O)overset((i)LiAlH_(4)//"ether")to R-CH_(2)-NH_(2)`
Heating alkyl halide with potassium salt of phthalimide followed by the hydrolysis produces primary amine. This process is known as Gabriel phtalimide reaction. The number of carbon atoms in the chain of amines of product is same as reactant.