Novel 3,4-dihydro-1,2,4-triazine compounds of the formula ##SPC1## In which R.sup.1 is alkyl or cycloalkyl; R.sup.2 is methyl, amino, alkylideneamino, methylamino, .beta.-hydroxyethylamino, 2-furylmethylamino, aralkylamino or substituted aralkylamino; and R.sup.3 is alkyl, aryl or substituted aryl; Are prepared by reacting the corresponding 1,2,4-triazin-5-one with sodium borohydride in the presence of a polar solvent at a temperature between -10.degree. and +25.degree.C. The novel compounds are outstandingly effective as herbicides and display particularly selective action.
该文献介绍了一种新型的3,4-二氢-
1,2,4-三嗪类化合物,其
化学式为##
SPC1##其中R.sup.1为烷基或环烷基;R.sup.2为甲基、
氨基、烷基
亚胺基、甲基
氨基、β-羟乙基
氨基、2-
呋喃甲基
氨基、芳基烷基
氨基或取代芳基烷基
氨基;R.sup.3为烷基、芳基或取代芳基。该化合物可以通过在极性溶剂存在下,将相应的
1,2,4-三嗪-5-酮与氢化
硼钠反应,在-10℃至+25℃的温度范围内制备而成。该新型化合物作为
除草剂非常有效,并表现出特别的选择性作用。