Nuclear Magnetic Resonance Spectra of Amines III. Identification of N-Substituted Amino Acids

Spectra of N -substituted amino acids examined in alkaline deuterium oxide and in trifluoroacetic acid show chemical shifts and first-order spin-spin splitting patterns that are useful for identification of N -methyl, N -methylene, N -phenyl, and other groups attached to the nitrogen of an amino acid.