Patent number: 6352959
Abstract: Thiochromanoylpyrazolone derivatives of the formula I
where:
A is an unsubstituted or substituted, saturated or unsaturated alkyl chain;
R1 is cyano, thiocyanato, nitro, OR4, SR5, SOR6, S02R6, ONR6NR7, ON═CR6R8, NR9R10, P(O)R11R12, P(S)R11R12, COR, CO2R6, unsubstituted or substituted phenyl or heterocyclyl;
R2 is alkyl, haloalkyl, alkoxy or haloalkoxy;
R3 is hydrogen, alkyl or halogen;
X is oxygen, sulfur, S═O, S(═O)2, CR13R14, C═O or C═NR15;
m is 0, 1 or 2;
n is 0, 1, 2, 3 or 4;
R16 is substituted pyrazol-4-yl-carbonyl or substituted (4,5-dihydro-5-oxo-pyrazol-4-yl)methylidene;
and their agriculturally useful salts;
Processes for preparing the thiochromanoylpyrazolone derivatives, compositions comprising them, and the use of these derivatives or of the compositions comprising them for controlling undesirable plants are described.
Type:
Grant
Filed:
May 31, 2001
Date of Patent:
March 5, 2002
Assignee:
BASF Aktiengesellschaft
Inventors:
Klaus Langemann, Ernst Baumann, Wolfgang von Deyn, Steffen Kudis, Guido Mayer, Ulf Misslitz, Ulf Neidlein, Matthias Witschel, Norbert Götz, Martina Otten, Karl-Otto Westphalen, Helmut Walter