申请人:Bayer Aktiengesellschaft
公开号:US04058392A1
公开(公告)日:1977-11-15
New N,N'-tetrasubstituted ureas of the formula ##STR1## in which X is oxygen, sulfur or an NR.sup.5 -- or SO.sub.2 --group, R is alkyl or an optionally substituted aryl group, or an optionally substituted aralkyl group, R.sup.1 and R.sup.4 are individually optionally substituted hydrocarbyl which may contain oxygen or sulfur, R.sup.2 is optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkoxy or cycloalkyl, R.sup.3 is alkyl, which may optionally be substituted by halogen, or is alkenyl, or R.sup.2 and R.sup.3 conjointly form an alkylene bridge, which can be interrupted by a hetero-atom, such as O, or N-alkyl group and which forms a heterocyclic ring with the adjoining nitrogen atom, R.sup.1 and R.sup.5, independently of one another, are each alkyl or conjointly form an alkylene bridge, which can be interrupted by a hetero-atom, such as O, and which forms a heterocyclic ring with the adjoining nitrogen atom; and Y is oxygen or sulfur; are remarkably effective and selective herbicides.
该公式中X为氧、硫或NR5-或SO2-基团,R为烷基或可选择取代的芳基团或可选择取代的芳基烷基团,R1和R4分别为可选择取代的含氧或硫的烃基,R2为可选择取代的烷基、可选择取代的烯基、可选择取代的烷氧基或环烷基,R3为烷基,可选择地被卤素取代,或为烯基,或R2和R3共同形成一个可以被杂原子(如O或N-烷基基团)中断的烷基桥,与相邻的氮原子形成杂环戒,R1和R5在彼此独立的情况下,分别为烷基或共同形成一个可以被杂原子(如O)中断的烷基桥,与相邻的氮原子形成杂环戒;Y为氧或硫。这些新的N,N'-四取代脲类化合物在除草剂中具有显著的高效性和选择性。