Process for preparing diazonium salts of 3-amino-pyrazole

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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260156, 260162, 260163, 546135, 548162, 548375, 548377, C07C10700, C07C10704, C07C10708, C07C11304

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042684366

ABSTRACT:
3-Diazonium salts of pyrazole, useful as intermediates in the preparation of azo dyes are obtained by an oxidative diazotization of 3-amino-pyrazolines with nitrous acid or with nitrosyl-sulphuric acid. The 3-diazonium salts of pyrazole have the following structure: ##STR1## wherein: X is a radical --CO-- or --COO--,

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Houben-Weyl, "Methoden der Organischen Chemie", vol. X/3, pp. 58-66 (1965).

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