(2R,4S)-反式-4-氟-L-脯氨酸盐酸盐 、 甲烷 在
水 、 乙醇 、 water ethanol 作用下,
以
水 为溶剂,
反应 16.0h,
以to afford 91.47 g of trans-4-fluoro-D-proline as off-white crystals melting at 258-260° C. with decomposition的产率得到(2R,4S)-4-氟吡咯烷-2-甲酸
参考文献:
名称:
N-arylsulfonamide and pyrrolidinecarboxylic acid intermediates, and their use for the preparation of herbicidal 1,3-dioxo-1h-pyrrolo[1,2-c]imidazole derivatives
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.
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:US06384234B1
公开(公告)日:2002-05-07
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 the substituents are defined in the specification.
N-ARYLSULFONAMIDE- AND PYRROLIDINECARBOXYLIC ACID INTERMEDIATES, AND THEIR USE FOR THE PREPARATION OF HERBICIDAL 1,3-DIOXO-1H-PYRROLO[1,2-C]IMIDAZOLE DERIVATIVES