Process for producing 5-hydroxy-4-thiomethylpyrazole compound

Details Process for producing 5-hydroxy-4-thiomethylpyrazole compound Process for producing 5-hydroxy-4-thiomethylpyrazole compound

C - Chemistry, Metallurgy

07

D

C07D 231/20 (2006.01) C07D 413/12 (2006.01)

Patent

CA 2560936

A pyrazole compound represented by the general formula (1) is reacted with a sulfur compound represented by the general formula (2) in the presence of a base and formaldehyde to produce a 5-hydroxy-4-thiomethylpyrazole compound represented by the general formula (3). Thus, the 5-hydroxy-4- thiomethylpyrazole compound can be easily and efficiently produced. This process enables the 5-hydroxy-4-thiomethylpyrazole compound to be easily produced in high yield under mild conditions through a single step without the necessity of using any special apparatus, expensive catalyst, transition metal, etc. It is friendly to the environment because it generates substantially no harmful wastes derived from a catalyst, etc. Industrial use of the process is highly valuable.

Un composé pyrazole représenté par la formule générale (1) est mis en réaction avec un composé de soufre représenté par la formule générale (2) en présence d'une base et avec formaldéhyde pour produire un composé 5-hydroxy-4-thiomethylpyrazole représenté par la formule générale (3). Ainsi, le composé 5-hydroxy-4-thiomethylpyrazole peut être produit facilement et économiquement. Ce procédé permet de produire un composé 5-hydroxy-4-thiomethylpyrazole facilement á haut rendement dans des conditions douces par une seule étape sans la nécessité d'utiliser un appareil spécial, un catalyseur onéreux, un métal de transition etc. Il préserve l'environnement car il ne génère essentiellement aucuns déchets nocifs depuis un catalyseur etc. L'usage industriel du procédé est de valeur élevée.

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