Synthesis of 7,8‐dihydro‐6<i>H</i>‐pyrazolo[3,4‐<i>b</i>]quinolin‐5‐ones and related derivatives

Abstract

Abstract This paper describes the synthesis of a new series of 4‐amino‐1‐(unsubstituted and chloro or fluoro substituted benzyl)‐7,8‐dihydro‐6 H ‐pyrazolo[3,4‐ b ]quinolin‐5‐ones 8 and the corresponding 7,8‐dihydro‐6 H ,9 H ‐pyrazolo[3,4‐ b ]quinoline‐4,5‐diones 13 . The derivatives obtained by reaction of these compounds with sodium azide in concentrated sulfuric acid are also reported.