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How will you prepare propan -1- amine from (i) Butane nitrile (ii) Propanamide (iii) 1- nitropropane |
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Answer» Solution :(i) Pereparation of propan -1- amine from butane nitrile: Butane bnitrile treated with acid hydrolysis FOLLOWED by Hoffmann.s bromamide degradation gives propan -1- amine `UNDERSET(("Butane nitrile"))(CH_(3)-CH_(2)-CH_(2))-Cnoverset(H+//H_(2)O)(to) CH_(3)-underset(("Butanamide"))(CH_(2)-CH_(2))-CONH_(2)overset(Br_(2)//KOH)(to) CH_(3)-underset(("Propane-1-amine"))(CH_(2)-CH_(2)-NH_(2))` (ii) Preparation of porpan-1-amine from propanamide: when propanamide is treated with `LiAlH_(4)` in the presence of water gives propan -1- amine. `underset(("Propanamide"))(CH_(3)CH_(2)CONH_(2))underset(H_(2)O)overset(LiAlH_(4))(to) underset(("Propan-1-amine"))(CH_(3)CH_(2)CH_(2)NH_(2))` (iii) Preparation of propan -1- amine from 1- nitropropane: `underset(("1-nitropropane"))(CH_(3)-CH_(2)-CH_(2))-NO_(2)underset(6(H))overset(Fe//HCl)(to) CH_(3)-underset(("Propan-1-amine"))(CH_(2)-CH_(2)-NH_(2))+2H_(2)O` Reduction of 1-nitropropane using `H_(2)//NI` or Fe/HCl GIES propan -1- amine. |
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