Novel urea derivatives of the formula ##STR1## wherein R and R.sub.1 are individually selected from the group consisting of hydrogen, chlorine, bromine, nitro, trifluoromethyl, lower alkyl of 1 to 6 carbon atoms and lower alkoxy of 1 to 6 carbon atoms, n is 0 or 1, X is selected from the group consisting of lower alkyl of 1 to 6 carbon atoms optionally substituted with halogen and a nitrogen heterocyclic optionally containing 1 or more other heteroatoms, Y is selected from the group consisting of hydrogen, alkyl of 1 to 4 carbon atoms and S--Z wherein Z is a nitrogen heterocyclic optionally containing 1 or more other heteroatoms and the dotted lines indicate that the compound of formula I may contain no oxygen bound to the sulfur atom or may be in sulfoxide or sulfonyl form which are useful as herbicides and thereon preparation.
该专利描述了一种新的
脲类衍
生物,其
化学式为##STR1##其中R和R.sub.1分别选自氢、
氯、
溴、硝基、三
氟甲基、1至6个碳原子的低级烷基和1至6个碳原子的低级烷氧基的群组,n为0或1,X选自1至6个碳原子的低级烷基(可选地带有卤素)和一个含有1个或多个其他杂原子的氮杂环,Y选自氢、1至4个碳原子的烷基和S--Z,其中Z是一个含有1个或多个其他杂原子的氮杂环,虚线表示化合物I可能不含有氧与
硫原子结合,或者可能处于亚砜或磺酰形式,这些化合物可以作为
除草剂使用。