text: Hydrogenolysis in the presence of a variety of palladium-based catalysts is the usual method for deprotection. Palladium on charcoal is typical.
  Alternatively, HBr and strong Lewis acids have been used, provided that a trap is provided for the released benzyl carbocation. 
  When the protected amine is treated by either of the above methods (i.e. by catalytic hydrogenation or acidic workup), it yields a terminal carbamic acid which then readily decarboxylates to give the free amine.
  2-Mercaptoethanol can also be used, in the presence of potassium phosphate in dimethylacetamide.