Problems and exercisesReduction

1. Which amine is obtained?

1. CH₃CH₂CH₂C≡N + LiAlH₄, then H₂O
2. CH₃CONHCH₂CH₃ + LiAlH₄, then H₂O
3. Cyclohexanone + CH₃NH₂, NaBH₃CN
4. Nitrobenzene + Fe/HCl, then NaOH

2. Reductive amination

Which carbonyl compound and which amine would you use to prepare N,N-dimethylbenzylamine by reductive amination? And 2-butylamine?

3. Oxidation state

Why can amides, nitriles and nitro compounds be reduced to amines, while amines cannot be reduced further?