N-arylsulfonamide and pyrrolidinecarboxylic acid intermediates, and their use for the preparation of herbicidal 1,3-dioxo-1h-pyrrolo[1,2-c]imidazole derivatives
申请人:DEGUSSA AG
公开号:US20020137946A1
公开(公告)日:2002-09-26
This invention is directed to compounds and intermediates of Formulae (6 and 3), useful in preparing herbicidal sulfonamides of Formula (1), including all geometric and stereoisomers thereof, and agricultural salts thereof, wherein X is H, F or Cl; Y is F or Cl; R
1
is C
1
-C
3
haloalkyl, C
2
-C
4
alkoxyalkyl; C
2
-C
6
haloalkoxyalkyl or C
2
-C
6
cyanoalkyl; R
2
is H, C
1
-C
4
alkyl, C
1
-C4 haloalkyl; C
3
-C
4
alkenyl, C
3
-C
4
alkynyl, C
2
-C
4
alkoxyalkyl, C
2
-C
4
alkylcarbonyl or C
2
-C
4
alkoxycarbonyl; R
3
is H or OH; R
4
is H, F or Cl; and R
5
is F or Cl; provided that when R
3
is H then R
4
is F or Cl and when R
3
is OH then R
4
is H.
本发明涉及公式(6和3)的化合物和中间体,其可用于制备公式(1)的除草磺胺类化合物,包括其所有几何和立体异构体,以及农业盐,其中X为H,F或Cl; Y为F或Cl; R1为C1-C3卤代烷基,C2-C4烷氧基烷基; C2-C6卤代烷氧基烷基或C2-C6氰基烷基; R2为H,C1-C4烷基,C1-C4卤代烷基; C3-C4烯基,C3-C4炔基,C2-C4烷氧基烷基,C2-C4烷基羰基或C2-C4烷氧羰基; R3为H或OH; R4为H,F或Cl; R5为F或Cl; 前提是当R3为H时,R4为F或Cl,当R3为OH时,R4为H。