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Synthesis and tautomeric behavior of 3-(pyrazolylhydrazonomethyl)-2-oxo-1, 2-dihydroquinoxalines. Specification of hydrazone imine and diazenyl enamine forms

✍ Scribed by Yoshihisa Kurasawa; Ho Sik Kim; Keiko Yonekura; Atsushi Takada; Yoshihisa Okamoto

Book ID: 112129304
Publisher: Journal of Heterocyclic Chemistry
Year: 1989
Tongue: English
Weight: 174 KB
Volume: 26
Category: Article
ISSN: 0022-152X
DOI: 10.1002/jhet.5570260364

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## Abstract The ^13^C‐nmr study was carried out for the tautomerism of the 3‐(arylhydrazono)methyl‐2‐oxo‐1,2‐dihy‐droquinoxalines 1a‐g and 2a‐e between the hydrazone imine A and diazenylenamine B forms, providing the carbon chemical shifts for the tautomers A and B of compounds 1a‐g and 2a‐e. The c