how to convert benzyl bromide to tri-N-butyl benzyl ammonium bromide

Question

how to convert benzyl bromide to tri-N-butyl benzyl ammonium bromide

Answer 1

You can just add tri-N-butyl amine. You don't need excess.

 

One step.

Answer 2

React benzyl bromide with sodium azide (NaN₃) to form benzylazide (Ph-CH₂-N₃).  Then reduce benzylazide with catalytic hydrogenation (H₂, Pd) to form benzylamine (Ph-CH₂-NH₂).  Finally, react benzylamine with excess 1-bromobutane (N-butyl bromide, CH₃CH₂CH₂CH₂Br) to give tri-N-butyl benzyl ammonium bromide.