Reactions between 1,2-naphthoquinones and arylhydrazines

1,2-Naphthoquinone (8) reacts with arylhydrazines 2 in acetic solution to give 1,2-naphthoquinone-2-arylhydrazones 13 and 2-arylazo-1-naphtholes, respectively. 4-Arylhydrazino-1,2-naphthoquinones 11 are not obtained. On the other hand 8 reacts with the same arylhydrazones 2 in neutral methanolic sol...

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Bibliographic Details
Published in:	Pharmazie Vol. 55; no. 11; p. 817
Main Authors:	Kallmayer, H J, Kruppert, C
Format:	Journal Article
Language:	German
Published:	Germany 01-11-2000
Subjects:	Hydrazines - chemistry Magnetic Resonance Spectroscopy Naphthoquinones - chemistry Spectrophotometry, Infrared
Online Access:	Get more information
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Summary:	1,2-Naphthoquinone (8) reacts with arylhydrazines 2 in acetic solution to give 1,2-naphthoquinone-2-arylhydrazones 13 and 2-arylazo-1-naphtholes, respectively. 4-Arylhydrazino-1,2-naphthoquinones 11 are not obtained. On the other hand 8 reacts with the same arylhydrazones 2 in neutral methanolic solution to give 11 and 13. The formation of 13 is remarkable, because 1,4-naphthoquinone (1) does not react with arylhydrazones 2 in neutral methanolic solution to give 6 and because arylhydrazones usually are condensed in acidic solution.
ISSN:	0031-7144