Process for producing 1h-1,2,4-triazole

Details Process for producing 1h-1,2,4-triazole Process for producing 1h-1,2,4-triazole

C - Chemistry, Metallurgy

07

D

260/313

C07D 249/08 (2006.01)

Patent

CA 1157869

Case 5-12585/CGC 906/= Process for producing 1H-1,2,4-triazole Abstract A process for producing 1H-1,2,4-triazole by reaction of formamide and hydrazine is described. The process comprises slowly introducing hydrazine, preferably in the form of hydrazine hydrate, into excess formamide preheated to 160-180°C, the molar ratio of formamide to hydrazine being at least 2.5:1, preferably at least 4:1; and, after completion of the reaction, obtaining the formed 1H-1,2,4-triazole by distilling off the unreacted formamide. 1H-1,2,4-triazole is a valuable intermediate for producing plant protective products, particularly fungicides.

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