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A Novel Route to 4-Aminopyrazoles and Aminopyrazolo[4,3-b]pyridines.

✍ Scribed by Abdellatif M. Salaheldin; Tayseer A. Abdallah; Naglaa F. Radwan; Hamdi M. Hassaneen


Publisher
John Wiley and Sons
Year
2007
Weight
20 KB
Volume
38
Category
Article
ISSN
0931-7597

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## Abstract The condensation of 4‐hydroxy‐6‐methyl‐2__H__‐pyran‐2‐one and substituted 2‐hydroxybenzaldehydes with ammonium acetate gave the title heterocycles. Synthesis of 1,5‐dihydro‐2‐methyl‐4__H__‐[1]naphtho‐[1′,2′:5,6]pyrano[4,3‐__b__]‐pyridine‐4,5‐dione is also described. A reaction mechanism