ISOXAZOLE DERIVATIVES, PROCESS FOR PREPARING THEREOF, HERBICIDAL COMPOSITION, AND METHOD OF CONTROLLING WEEDS Russian patent published in 1999 - IPC

FIELD: agriculture. SUBSTANCE: present invention describes isoxazole derivatives of formula I: wherein Ar is phenyl substituted by 1-3 groups of R² and where two substituents at adjacent positions of phenyl ring together with two atoms to which they are attached form 5-6 membered heterocyclic ring containing 1 or 2 heteroatoms selected from O, S, N, said ring being substituted by one or more groups R²¹, R is H; C_3-6 is R² cycloalkyl group; C_1-6 is halogen atom, SR⁵ alkyl optionally substituted by halogen, -SOR⁵, -SO₂R⁵, -OR⁵, -(CR⁹R¹⁰)_t-S(O)_pR⁵; R²¹ is R² or =O, R⁵ is C_1-6 alkyl; R⁹ and R¹⁰ are H; p is 0, 1 or 2; t is 1. Compounds of formula I are useful as herbicides. EFFECT: improved properties of the herbicidal composition. 16 cl, 39 ex, 2 tbl