2-氰基乙基肼 、 盐酸 、 、 potassium carbonate 、 乙腈 在
乙腈 作用下,
反应 8.0h,
以20 g of 1-(2-cyanoethyl)-5-chloro-3-hydroxy-1,2,4-triazole of melting point 149°-150° C. were obtained的产率得到3-(3-氯-5-氧代-1H-1,2,4-三唑-2-基)丙腈
O-Alkyl-O-[1-(2-cyanoalkyl)-5-halo-1,2,4-triazol(3)yl]-(thiono)(thiol)-phos phoric(phosphonic) acid esters and ester-amides of the formula ##STR1## in which R is alkyl with 1 to 6 carbon atoms, R.sub.1 is phenyl or alkyl, alkoxy, alkylthio, monoalkylamino or dialkylamino with 1 to 6 carbon atoms per alkyl or alkoxy, R.sub.2 is hydrogen or alkyl with 1 to 4 carbon atoms, Hal is halogen, and X is oxygen or sulfur, which possess insecticidal and acaricidal properties.