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US 4,380,642 AGranted
Simultaneous preparation of pyrazole and triazoles
AssigneeBASF SE
InventorsNorbert Rieber, Rolf Platz, Werner Fuchs
Life of this patent
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Abstract
A process for the simultaneous preparation of pyrazole and triazoles by reacting a triazoline compound with a basic compound and then oxidizing the product with hydrogen peroxide. The triazoles and pyrazole obtainable by the process of the invention are valuable starting materials for the preparation of dyes, pesticides and drugs.
Claims8
A process for the simultaneous preparation of pyrazole and triazoles of the formula ##STR8## where R.sup.1 is:
- hydrogen;
- or
- alkyl of 1 to 18 carbon atoms, cycloalkyl of 5 to 8 carbon atoms, aralkyl or alkylaryl of 7 to 12 carbon atoms;
- or
- phenyl or naphthyl which are unsubstituted or substituted by from 1 to 5 bromine atoms, fluorine atoms, chlorine atoms, iodine atoms, nitro groups, dialkylamino groups of 1 to 4 carbon atoms per alkyl group and/or alkoxy groups of 1 to 4 carbon atoms, and where R.sup.1 may be additionally substituted by halogen, nitro or alkyl or alkoxy each of 1 to 4 carbon atoms, which process comprises a first step of reacting a triazoline compound of the formula ##STR9## where R.sup.1 has the above meaning and R.sup.2 is hydrogen, alkyl of 1 to 18 carbon atoms or said alkyl additionally substituted by halogen, nitro or alkyl or alkoxy each of 1 to 4 carbon atoms, with a basic compound and, thereafter, a second step of oxidizing the product of said first step with hydrogen peroxide.
2 more elements
Dependencies are inferred from the claim text.