Abstract
A series of linear tetrapeptides and macrocyclic pentapeptides has been synthesized starting with
N,N
-bis(1-carboxy-2-substituted)-3,5-diaminocarbonyl)pyridine and
N,N
-bis(1-hydrazonyl-2-substituted)-3,5-diaminocarbonyl)pyridine. Structures of newly synthesized compounds were elucidated by IR,
1
H and
13
C NMR, and MS spectral data and elemental analysis.