Process for the preparation of 1,2,4-triazolidine-3,5-dione

Details Process for the preparation of 1,2,4-triazolidine-3,5-dione Process for the preparation of 1,2,4-triazolidine-3,5-dione

1980-11-21

1982-04-06

Rollins, Alton D.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D24912

Patent

active

043236871

ABSTRACT:
A process for the preparation of 1,2,4-triazolidine-3,5-dione, which comprises suspending hydrazodicarbonamide in at least one organic, optionally water-miscible solvent and cyclising it at a temperature in the range of from 150.degree. to 280.degree. C. and at a pressure of from 50 mbar to 5 bar with removal of the ammonia split off from the reaction mixture, and isolating the resulting 1,2,4-triazolidine-3,5-dione after crystallization.

REFERENCES:
Thiele et al., Liebigs Annalen der Chemie, vol. 283, p. 41, (1894).
Pellizzari et al., Gazz. Chim. Ital., vol. 24, p. 506, (1894).

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