Question

How will you prepare propane - 1 - amin from butanamide?

Answer 1

Using the Hoffmann bromamide degradation, you can convert the butanamide to propan-1-amine.  

The explanation for the Hoffmann bromamide degradation reaction:

When you treat amide with bromine in an aqueous solution of NaOH, degradation takes place in amide which results in the formation of primary amine.  

CH3–CH2-CH2-CONH2 + Br2+ 4 NaOH ---> CH3–CH2-CH2-NH2 + 2Na2CO3+2NaBr+2H2O.