申请人:SCHERING AGROCHEMICALS LIMITED
公开号:EP0244097A2
公开(公告)日:1987-11-04
The invention provides certain herbicidal pyrazolopyrimidine derivatives, processes for their preparation, and compositions containing them, the compounds being of the formula:
and salts thereof, where:
R' and R2, which may be the same or different, each represent hydrogen, hydroxy, halo, substituted or unsubstituted alkyl, alkoxy, alkylthio, alkenyl, alkynyl or phenyl, or heterocyclyl;
R6 represents hydrogen, halo, cyano, carboxy, alkoxycarbonyl, or substituted or unsubstituted alkyl or carbamoyl; or R6 and one of R' and R2 together represent an alkylene chain of 3 or 4 carbon atoms:
R3 represents hydrogen, alkyl, aryl, aralkyl, carboxy, substituted or unsubstituted alkoxycarbonyl, carbamoyl or thiocarbamoyl, cyano or nitro;
X represents -NR-SO2-, -S02-0-, -S02-NR- or -S(O)n-CR'R"-, where n is 0, 1 or 2 and R, R' and R" each represent hydrogen, or substituted or unsubstituted alkyl, alkenyl, alkynyl, alkoxycarbonyl, acyl, alkylsulphonyl or arylsulphonyl; and R4 represents hydrogen, heterocyclyl, or a substituted or unsubstituted alkyl or aryl group.
本发明提供了某些具有除草作用的吡唑并嘧啶衍生物、其制备工艺以及含有它们的组合物,这些化合物的化学式为
及其盐类,其中
R'和 R2(可以相同或不同)各自代表氢、羟基、卤代、取代或未取代的烷基、烷氧基、烷硫基、烯基、炔基或苯基或杂环基;
R6 代表氢、卤素、氰基、羧基、烷氧基羰基或取代或未取代的烷基或氨基甲酰基;或 R6 和 R' 及 R2 中的一个共同代表 3 或 4 个碳原子的亚烷基链:
R3 代表氢、烷基、芳基、芳烷基、羧基、取代或未取代的烷氧羰基、氨基甲酰基或硫代氨基甲酰基、氰基或硝基;
X代表-NR-SO2-、-S02-0-、-S02-NR-或-S(O)n-CR'R"-,其中n为0、1或2,R、R'和R "各自代表氢、或取代或未取代的烷基、烯基、炔基、烷氧羰基、酰基、烷基磺酰基或芳基磺酰基;以及R4代表氢、杂环基、或取代或未取代的烷基或芳基。