Compounds of the formula ##STR1## wherein R, R.sup.1 and R.sup.2 are independently hydrogen; alkoxy of 1 to 6 carbon atoms; aliphatic or cycloaliphatic hydrocarbyl of 1 to 10 carbon atoms optionally substituted wih halogen atoms; carbocyclic aryl of 6 to 15 carbon atoms optionally substituted with halogen atoms, nitro groups, alkyl groups, alkoxy groups or trifluoromethyl; or a heterocyclic group of 1 hetero oxygen, sulfur or nitrogen atoms and 4 to 5 annular carbon atoms and a total of 4 to 8 carbon atoms, find use as herbicides.
该公式化合物中的R、R.sup.1和R.sup.2分别为氢;1至6个碳原子的烷氧基;1至10个碳原子的脂肪或环脂烃,可选地取代卤素原子;6至15个碳原子的碳环
芳烃,可选地取代卤素原子、硝基基团、烷基、烷氧基或三
氟甲基;或者是含有1个杂原子(氧、
硫或氮原子)和4至5个环状碳原子以及总共4至8个碳原子的杂环基团,作为
除草剂使用。