CARBAMIC ACID PHENYL ESTERS AND A HERBICIDAL AGENT CONTAINING THEM

摘要

Novel carbamic acid phenyl esters have the formula I (wherein R1 represents C1-C2 alkoxy- C1-C2-alkyl, di-C1-C2-alkoxy- C1-C2-alkoxy, CN-C1-C2-alkyl, Hal-C1-C2alkyl, HO-C1-C2-alkyl, phenyl-C1-C2-alkyl, 1,3-dioxolan-2- yl-methyl, 2-methyl-1,3-dioxolan-4- yl-methyl, 4-methyl-1,3-dioxolan-2- yl-methyl, 2,2-dimethyl-1,3-dioxolan- 4-yl-methyl or H2N-CO-C1-C2 alkyl, R2 represents phenyl optionally substituted by 1 or 2 substituents selected from Hal atoms and methyl and methoxy groups and R3 represents C1-C8-alkyl, C2-C8-alkenyl, cyclopropyl or Cl3C, or R1 represents methyl or ethyl, R2 represents alpha -CN- benzyl or 1-CN-2-phenylethyl and R3 represents ethyl). The compounds may be prepared from the appropriate 3-acylaminophenols or the chloroformates thereof. The novel compounds of the formula I have a herbicidal action and accordingly may be made up with suitable carriers into herbicidal preparations and may be used for protecting living plants and crop areas against weeds.