A Short Synthesis of 4- and 6-Azaindol-2(3H)-ones

Abstract

Although indol-2(3H)-ones possess a wide range of pharmacological¹ and microbiological² activities, the corresponding azaindol-2(3H)-ones have stimulated little interest. Successful syntheses have been reported for the title compounds^3,4 involving several stages which in our hands gave a variety of side products, especially in the hydrogenation stage.