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

Abstract From the Canadian patent

Process for the production of 3-hydroxy-1,2,4-triazole derivatives of the formula I, wherein R1 represents an alkyl or cycloalkyl group R2 denotes an alkyl, cyclo-, alkyl, alkenyl alkynyl or an optionally substituted benzyl group and X stands for oxygen, sulphur or a group , wherein R3 denotes an alkyl alkenyl, or alkynyl group, wherein a 2-R1-hydrazinecarboxylic acid ester is reacted with cyanogen chloride to form the corresponding 2-R1-2-cyanohydrazinecarboxylic acid ester which is subsequently cyclised under alkaline conditions in the presence of a compound R2XH.