Displacement of nitrogen functions

Few nitrogen functions are sufficiently good leaving groups to undergo displacement by organomagnesium compounds in preference to other reactions. A few examples of displacement of tetraalkylammonium from quaternized allylic amines have been described, e.g. 

The reactions of a,a -bis-benzotriazolylamines have also been described tertiary amines undergo disubstitution [14], but secondary amines undergo mainly monosubstitution and elimination, giving imines [15]  

The reaction has also been applied to the synthesis of vic-diamines [16]  

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