Reaction of Amine with Carbonyl compunds
Only primary amines react with aldehydes and ketones and condensation products are obtained. These condensation products are known as imines or Schiffs bases.
R-CHO (aldehyde) + RNH2 ---------> RCH = N-R (aldimine)
R2CO (ketone) + R-NH2 --------> R2C = N-R (ketimines)
Imines can be reduced to secondary amines. This reaction, in turn, can be used to convert a primary amine to secondary amine.
RCH = NR ------(H2 / Ni)-----> R-CH2-NH-R (Secondary amine)
R2C = N-R ------(H2 / Ni)-----> R2CH-NH-R
For more visit Properties of Amines