Amongst the given set of reactants, the most appropriate for preparing 2o amine is
1. 2o R - Br + NH3
2. 2oR — Br + NaCN followed by H2/Pt
3. 1o R — + RCHO followed by H2/Pt
4. 1o R — Br(2 mol) + potassium phthalimide followed by O+/ heat
Hint: Nucleophilic addition reaction followed by reduction.
In the first reaction, nucleophilic addition reaction takes place and in the second step reduction reaction takes place.
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