Herbicidal 3-substituted pyridine compounds and derivatives thereof of the formula: ##STR1## wherein Ar is a substituted or unsubstituted 5- or 6-membered heteroaryl group having 1, 2 or 3 ring nitrogen atoms with the remainder of the ring atoms being carbon; a substituted or unsubstituted 5-membered heteroaryl group having a ring heteroatom of oxygen or sulfur with the remainder of the ring atoms being carbon; or a substituted or unsubstituted 5-membered heteroaryl group having one ring nitrogen atom and either an oxygen or sulfur ring heteroatom with the remainder of the ring atoms being carbon. Herbicidal compositions containing such 3-substituted pyridine compounds and derivatives thereof and methods of controlling undesirable vegetation employing these compounds and derivatives are also disclosed. The compounds in which XR is hydroxyl are also useful as intermediates for producing the disclosed 3-substituted pyridine derivatives.
3-取代
吡啶化合物及其衍
生物的
草甘膦,
化学式如下:##STR1##其中Ar是取代或未取代的含有1、2或3个环氮原子的5-或6成员杂芳基团,其余环原子为碳;取代或未取代的含有氧或
硫环杂原子的5成员杂芳基团,其余环原子为碳;或者取代或未取代的含有一个环氮原子和一个氧或
硫环杂原子的5成员杂芳基团,其余环原子为碳。还公开了含有这些3-取代
吡啶化合物及其衍
生物的
除草剂组合物以及利用这些化合物和衍
生物控制不良植被的方法。其中XR为羟基的化合物也可作为生产所述3-取代
吡啶衍生物的中间体。