3-甲氧基-4-氯苯胺 、 2,4-二溴丁酰氯 、 三乙胺 、 水 在
magnesium sulfate 、 silica gel 作用下,
以
二氯甲烷 为溶剂,
反应 120.08h,
以to give the title compound as a yellow solid (3.9 g) melting at 113-115° C.的产率得到3-bromo-1-(4-chloro-3-methoxyphenyl)-2-pyrrolidinone
Compounds of Formula (1), their N-oxides and agriculturally suitable salts, are disclosed which are useful for controlling undesired vegetation, wherein A, R?1, R2a, R2b¿, W, Y, and Z are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula (1) and a method for controlling undesired vegetation which involves contacting the vegetation or its environment with an effective amount of a compound of Formula (1).
Herbicidal heterocycles
申请人:——
公开号:US20040106520A1
公开(公告)日:2004-06-03
Compounds of Formula (1), their N-oxides and agriculturally suitable salts, are disclosed which are useful for controlling undesired vegetation, wherein A, R
1
, R
2a
, R
2b
, W, Y, and Z are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula (1) and a method for controlling undesired vegetation which involves contacting the vegetation or its environment with an effective amount of a compound of Formula (1).