✦ LIBER ✦

Reactions with the Arylhydrazones of α-Cyanoketones: The Structure of 2-Arylhydrazono-3-ketimino-nitriles

✍ Scribed by Mohamed Hilmy Elnagdi; Mohamed Mohamed Mohamed Sallam; Hussein Mahmoud Fahmy; Saad Abdel-Motteleb Ibrahim; Mohamed Ajmal Mohamed Elias

Book ID: 102250493
Publisher: John Wiley and Sons
Year: 1976
Tongue: German
Weight: 431 KB
Volume: 59
Category: Article
ISSN: 0018-019X
DOI: 10.1002/hlca.19760590220

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✦ Synopsis

Abstract

Analysis of the IR., UV., and polarographic data of a variety of 2‐arylhydrazono‐3‐ketimino‐nitriles indicated that these derivatives exist mainly in the intramolecularly chelated hydrazone structure 1.

Compounds 1 reacted with hydrazine hydrate to yield the corresponding 5‐amino‐4‐arylazopyrazoles (3).

Compounds 3a reacted with acetylacetone, ethyl acetoacetate, and diethyl malonate to yield the pyrazolo[1, 5‐a]pyrimidine derivatives 4, 5, and 7 respectively. Compound 3a also reacted with benzoylisothiocyanate to yield the pyrazolyl thiourea derivative 8.

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