Process for the production of 3-hydroxy-1,2,4-triazole derivativ

Details Process for the production of 3-hydroxy-1,2,4-triazole derivativ Process for the production of 3-hydroxy-1,2,4-triazole derivativ

1977-03-22

1978-02-28

Rollins, Alton D.

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

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

260308R, 260308C, C07D24912, C07D24914, C07D40304, C07D41304

Patent

active

040769380

ABSTRACT:
Process for the production of 3-hydroxy-1,2,4-triazole derivatives of the formula I ##STR1## wherein R.sub.1 represents an alkyl or cycloalkyl group, R.sub.2 denotes an alkyl, cycloalkyl, alkenyl, alkynyl or an optionally substituted benzyl group and X stands for oxygen, sulphur or a group <N--R.sub.3, wherein R.sub.3 denotes an alkyl, alkenyl or alkynyl group, or together with radical R.sub.2 and the adjacent nitrogen atom it denotes a pyrrolidino or morpholino group, wherein a 2-R.sub.1 -hydrazinecarboxylic acid ester is reacted with cyanogen chloride to form the corresponding 2-R.sub.1 -2-cyanohydrazinecarboxylic acid ester which is subsequently cyclized under alkaline conditions in the presence of a compound R.sub.2 XH.

REFERENCES:
patent: 3862125 (1975-01-01), Hoffmann et al.
patent: 3867395 (1975-02-01), Seidel et al.
Gehlen, Ann., vol. 563, pp. 185-200, (1949).

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