Red colored 2,6-disubstituted push-pull aminoazulenecarboxylates were
prepared in very good yields from 2,6-azulenedicarboxylate, the key co
mpound in this synthesis, which was prepared in four steps from 2-inda
ncarboxylic acid. Effects of the push-pull substituents on the azulene
s were analyzed by NMR and UV-visible spectroscopy.