Synthesis of 5-Methyl and 7-Methyl-4-Azaindol-2(3h)-ones

Abstract

Azaindol-2(3H)-ones have stimulated little interest, the only successful syntheses being 7-azaoxindole ^1,2,3,3-dimethyl-7-azaoxindole³ and recently 4-azaoxindole⁴, whilst several have been unsuccessful ^5,6. Following our studies in the oxindole series ⁷ we now wish to describe a short synthesis of the novel azaoxindole title compounds.