Process for preparing 4-amino-1, 2, 4 triazole

Details Process for preparing 4-amino-1, 2, 4 triazole Process for preparing 4-amino-1, 2, 4 triazole

C - Chemistry, Metallurgy

07

D

C07D 249/08 (2006.01) C07D 403/00 (2006.01) C07D 521/00 (2006.01)

Patent

CA 2218707

The invention relates to a process for the preparation of products of the formula (1): (see Fig. 1) wherein R represents H or an alkyl group containing 1 to 10 carbon atoms and which can be substituted by one or more aryl, heteroaryl, hydroxy or alkene groups, in which hydrazine is reacted with an insufficient quantity of carboxylic acid R COOH. The reaction water and possibly the hydrazine and acid dilution water is then eliminated. This process is particularly useful for preparing 4-amino-1,2,4 triazole.

L'invention concerne un procédé de préparation de produits de formule (1): (voir fig. 1) dans laquelle R désigne H ou un groupe alkyle contenant de 1 à 10 atomes de carbone et pouvant être substitué par un ou plusieurs groupes aryles, hétéroaryles, hydroxy ou alcenyles dans lequel on effectue la réaction de l'hydrazine avec un défaut d'acide carboxylique R COOH puis qu'on élimine l'eau de réaction et éventuellement l'eau de dilution de l'hydrazine et de l'acide. Ce procédé est particulièrement utile pour préparer le 4-amino-1,2,4 triazole.

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