5-Fluoromethyl-1,2,4-triazolo(1,5-a)-pyrimidine-2-sulfonamides, process for their preparation and compositions for their use as herbicides
申请人:DowElanco
公开号:EP0340828A1
公开(公告)日:1989-11-08
N-(Substituted-phenyl)-5-fluoromethyl-1,2,4-triazolo[1,5-a]pyrimidine-2-sulfonamides of formula
wherein:
Y' is H, OH, Cl, CH₃, C₂H₅, OCH₃, OC₂H₅, or SCH₃;
R¹ is H, F, Cl, Br, CH₃, CF₃, NO₂, CO₂(C₁-C₄ alkyl), or CON(C₁-C₄ alkyl)₂;
R² is H or CH₃; and
R³ is F, Cl, Br, NO₂, CO₂(C₁-C₄ alkyl), CON(C₁-C₄ alkyl)₂, OCH₃, or OC₂H₅; are prepared
from 2-benzylthio-5-fluoromethyl-1,2,4-triazolo[1,5-a]-pyrimidines and found to be herbicidal and selective to wheat and cotton, and some compounds are degradable in the soil.
N-(取代-苯基)-5-氟甲基-1,2,4-三唑并[1,5-a]嘧啶-2-磺酰胺,其式为
其中
Y' 是 H、OH、Cl、CH₃、C₂H₅、OCH₃、OC₂H₅ 或 SCH₃;
R¹ 是 H、F、Cl、Br、CH₃、CF₃、NO₂、CO₂(C₁-C₄ 烷基)或 CON(C₁-C₄ 烷基)₂;
R² 是 H 或 CH₃;以及
R³ 是 F、Cl、Br、NO₂、CO₂(C₁-C₄烷基)、CON(C₁-C₄烷基)₂、OCH₃或 OC₂H₅;制备方法是
由 2-苄硫基-5-氟甲基-1,2,4-三唑并[1,5-a]嘧啶制备而成,对小麦和棉花具有除草和选择性作用,其中一些化合物可在土壤中降解。