Amides Nomenclature

The name of the related acid is used first and the oic acid or ic acid suffix is replaced by amide (only for 1º-amides).
    e.g.

CH₃CONH₂ is ethanamide (or acetamide).
    2º & 3º-amides have alkyl substituents on the nitrogen atom. These are designated by "N-alkyl" term(s) at the beginning of the name.
    e.g.

CH₃(CH₂)₂CONHC₂H₅ is

N-ethylbutanamide;   &   HCON(CH₃)₂ is N,N-dimethylmethanamide (or N,N-dimethylformamide).
    Cyclic amides are called lactams. A Greek letter identifies the location of the nitrogen on the alkyl chain relative to the carboxyl carbonyl group.