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Reaction of 5-amino-1-aryl-3-methylpyrazoles with benzylidene derivatives of meldrum's acid: Synthesis and characterization of pyrazolo[3,4-b]pyridinones

✍ Scribed by Jairo Quiroga; Angelina Hormaza; Braulio Insuasty; Manuel Márquez

Publisher
Journal of Heterocyclic Chemistry
Year
1998
Tongue
English
Weight
201 KB
Volume
35
Category
Article
ISSN
0022-152X

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✦ Synopsis

Abstract

A series of dihydropyrazolo[3,4‐b]pyridin‐6‐ones 3 was prepared by cyclization of 5‐amino‐1‐aryl‐3‐methylpyrazoles 1 and Meldrum's acid benzylidene derivatives 2 in nitrobenzene. The structure of 4,5‐dihydropyrazolo[3,4‐b]pyridin‐6‐ones and reaction orientation were determined by nmr measurements.

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