1-Substituted-pyrrolo[2,3-b]pyridin-3-ones (7-azaindolinones) have bee
n obtained by Baeyer-Villiger oxidation. Reaction of 7-azaindolinone w
ith aromatic aldehydes led to 2-substituted-7-azaindolinones. Synthesi
s of pyrido[3',2':4,5]pyrrolo[3,2-b]naphtyridine have been described.