Rm. Adlington et al., A versatile synthetic route to quinoxaline, pyrazine and 1,2,4-triazine substituted alpha-amino acids from vicinal tricarbonyls, J CHEM S P1, (3), 2000, pp. 299-302
A range of novel heterocyclic alpha-amino acids has been synthesised by the
reaction of diamines and amidrazones with alpha-amino acid vicinal tricarb
onyl reactive substrates.