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Syntheses and advanced NMR structure determination of androsteno-[17,16-d]-pyrimidine derivatives

✍ Scribed by Peter Forgo; Irén Vincze


Book ID
117213504
Publisher
Elsevier Science
Year
2002
Tongue
English
Weight
162 KB
Volume
67
Category
Article
ISSN
0039-128X

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✍ Stefano Chimichi; Barbara Cosimelli; Fabrizio Bruni; Silvia Selleri 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 376 KB

## Abstract The condensation of 3(5)‐aminopyrazole and 5‐amino‐3‐phenylpyrazole with ethyl 2,4‐dioxopentanoate and 2‐ethoxymethylidene‐3‐oxobutyrate has been re‐investigated. Contrary to previos reports, the former reaction gives rise to both regioisomeric pyrazolo [1,5‐a]pyrimidines (5‐carbethoxy‐