A process for preparing trifluoromethylpyridyl (oxy/thio) phenoxypropionic compounds being especially active as herbicides
申请人:THE DOW CHEMICAL COMPANY
公开号:EP0057473A2
公开(公告)日:1982-08-11
A process for preparing trifluoromethylpyridyl(oxy/ thio) phenoxy propionic compounds especially active as herbicides for the control of grassy or graminaceous weeds, corresponding to the formula I
weherein
T is oxygen or sulfur;
X is Cl, Br or CF3;
Y is H, Cl, Br or CF3, provided at least one of X and Y is CF3;
Z is -C-OR, -CNR1R2, -C-OeM⊕, -CN, -CH2OR3, -CH2CR4 or -CSRs;
M is ⊕NHR1R1R1, Na, K, Mg or Ca;
R is H, C1-8 alkyl, benzyl, chlorobenzyl, or C3-6 alkoxyalkyl;
R, is H, C1-4 alkyl, or C2-3 hydroxyalkyl;
R2 is H, or -OCH3;
R3 is H or C1-4 alkyl;
R4 is C1-7 alkyl; and
R5 is C1-4 alkyl, as disclosed in the published European Patent Application No. 0 000 483, comprising the using as an intermediate of a trifluoromethylpyridyl(oxy/ thio)phenol compound corresponding to the formula II
wherein
T is oxygen or sulfur; and
Y is H or Cl, and M is H or a cation of a caustic solution.
一种制备三氟甲基吡啶基(氧/硫)苯氧基丙酸化合物的工艺,该化合物作为除草剂特别有效,可用于防治禾本科杂草或禾本科杂草,其对应式为 I
其中
T 是氧或硫;
X 是 Cl、Br 或 CF3
Y 是 H、Cl、Br 或 CF3,条件是 X 和 Y 中至少有一个是 CF3;
Z 是-C-OR、-CNR1R2、-C-OeM⊕、-CN、-CH2OR3、-CH2CR4 或-CSRs;
M 是 ⊕NHR1R1R1、Na、K、Mg 或 Ca;
R 是 H、C1-8 烷基、苄基、氯苄基或 C3-6 烷氧基烷基;
R 是 H、C1-4 烷基或 C2-3 羟烷基;
R2 是 H 或 -OCH3
R3 是 H 或 C1-4 烷基;
R4 是 C1-7 烷基;和
R5 是 C1-4 烷基,如已公开的欧洲专利申请 0 000 483 号中所公开的,包括使用对应于式 II 的三氟甲基吡啶基(氧基/硫代)苯酚化合物作为中间体
其中
T 是氧或硫;以及
Y 是 H 或 Cl,M 是 H 或苛性碱溶液的阳离子。