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Tricyclic Heteroaromatic Systems. Synthesis and A1 and A2a Adenosine Binding Activities of Some 1-Aryl-1,4-dihydro-3-methyl[1]benzopyrano[2,3-c]pyrazol-4-ones, 1-Aryl-4,9-dihydro-3-methyl-1H-pyrazolo[3,4-b]quinolin-4-ones, and 1-Aryl-1H-imidazo[4,5-b]quinoxalines

✍ Scribed by Catarzi, Daniela; Cecchi, Lucia; Colotta, Vittoria; Filacchioni, Guido; Martini, Claudia; Tacchi, Paolo; Lucacchini, Antonio


Book ID
120543024
Publisher
American Chemical Society
Year
1995
Tongue
English
Weight
793 KB
Volume
38
Category
Article
ISSN
0022-2623

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Synthesis of 1-methyl-, 4-nitro-, 4-amin
✍ Y. C. Fiamegos; G. A. Pilidis; G. Varvounis 📂 Article 📅 2001 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 44 KB

## Abstract 4‐Aminopyrazole‐3‐ones **4b, e, f** were prepared from pyrazole‐3‐ones **1b‐d** in a four‐step reaction sequence. Reaction of the latter with methyl __p__‐toluenesulfonate gave 1‐methylpyrazol‐3‐ones **2b‐d**. Compounds **2b‐d** were treated with aqueous nitric acid to give 4‐nitropyraz