Process for producing 5-aminotetrazole

Details Process for producing 5-aminotetrazole Process for producing 5-aminotetrazole

1995-02-22

1997-01-14

Springer, David B.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D25706

Patent

active

055941460

ABSTRACT:
A process for producing 5-aminotetrazole comprising the steps of: reacting cyanamide with hydrazine in a solvent to form a salt of aminoguanidine; adding thereto an acid and then a nitrite to form a salt of diazoguanidine; and cyclizing the salt of diazoguanidine, upon heating, to thereby produce the 5-aminotetrazole, without isolating the intermediate product and also a process for producing 5-aminotetrazole or a metal salt thereof in the form of powder by spray drying.

REFERENCES:
patent: 4906778 (1990-05-01), Schaffhausen
J. Org. Chem., 15, 1082, (1950), "Synthesis of 5-AT from the reaction of cyanamide and hydrogen azide acid".
J. Org. Chem., 18, 779, (1953), "Synthesis of 5-AT from salts of diazoguanidine, which is prepared from aminoguanidine salt and nitrous acid".
The Journal of Organic Chemistry, vol. 18, Jul. 1953, pp. 779-790, William G. Finnegan et al.
Chemical Abstracts, vol. 96., No. 11, 15 Mar. 1982, abstract No. 85565t, p. 593 & CS-A-190 055 (Arient Josef et al.).

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