Preparation of 4-amino-1,2,4-triazol-5-ones

Details Preparation of 4-amino-1,2,4-triazol-5-ones Preparation of 4-amino-1,2,4-triazol-5-ones

1988-12-15

1990-08-28

Hollrah, Glennon H.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D24912

Patent

active

049527010

ABSTRACT:
A process for the preparation of 4-amino-1,2,4-triazol-5-one of the formula ##STR1## in which R is alkyl, comprising in a first step reacting phosgene with an acylhydrazide of the formula ##STR2## to produce an oxadiazolinone of the formula ##STR3## and in a second step reacting the oxadiazolinone with hydrazine hydrate.

REFERENCES:
patent: 3884910 (1975-05-01), Pilgram
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Chem. Ber. 27, 55 [1894].
J. Prakt. Chem. [2] 52, 454 [1895].
Chem. Ber. 57, 1321 [1924].
Liebigs Ann. Chem. 475, 120 [1929].
Inorganic Synthesis 4, 32 [1953].
Z. Chem. 8, 221 [1968].
Endo et al., "Syntheses and Reactions of, etc", CA 79:1056/qt (1973).
Metivier et al., "Herbicidal 3-(2,4-dichloro, etc)", CA 86: 29822f (1977).

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