N-substituted O-pyrazol-4-yl carbamates of the general formula ##STR1## are new and are obtained when (a) a 4-hydroxy-pyrazole of the general formula ##STR2## is reacted with an N-sulphenylated carbamoyl halide of the formula ##STR3## or (b) a 4-hydroxy-pyrazole of formula (II) is reacted with an acylating agent of the general formula ##STR4## or (c) an O-pyrazol-4-yl carbamate of the general formula ##STR5## is reacted with a sulphenyl halide of the general formula R.sup.7 --(S).sub.n --Y (VI) The new N-substituted O-pyrazol-4-yl carbamates of the formula (I) are distinguished by high activity as pest-combating agents, in particular by high insecticidal and nematicidal activity.
通用公式##STR1##的N-取代O-
吡唑-4-基
氨酸酯是新的,并且当(a)通用公式##STR2##的
4-羟基吡唑与通用公式##STR3##的N-磺酰化
氨酰卤化物发生反应时,或者(b)公式(II)的
4-羟基吡唑与通用公式##STR4##的酰化剂发生反应时,或者(c)通用公式##STR5##的O-
吡唑-4-基
氨酸酯与通用公式R.sup.7--(S).sub.n--Y(VI)的
磺酰卤化物发生反应时获得。公式(I)的新的N-取代O-
吡唑-4-基
氨酸酯以其高活性作为
杀虫剂,尤其是高杀虫和杀线虫活性而著称。