Pyrazde herbicides

US6339046B1 · kind B1 · utility

Assignee

• Syngenta Investment Corporation · US

Inventors

• Kurt Nebel · Hochwald, CH
• Juraj Tuleja · Bratislava, SK
• Georg Pissiotas · Lörrach, DE
• Hans-Georg Brunner · Lausen, CH

Key dates

• Filing date: Oct 28, 1997
• Grant date: Jan 15, 2002
• Expiry date: Oct 28, 2017

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D231/14
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula I in whichR1 is C1-C4alkyl;R2 is cyano or NH2C(S)—;R3 is hydrogen, C1-C4alkyl, C1-C4haloalkyl, C3- or C4alkenyl, C3- or C4alkynyl, C3-C8haloalkenyl, NC—CH2—, HOC(O)—CH2— or C1-C4alkoxy-C(O)—CH2—;W is a group  andR4 to R6, R60, R61, R70, X1, X2, n1 and A1—B1 are as defined in claim 1, and the pyrazole N-oxide, agronomically acceptable salts and stereomers of these compounds of the formula I, with the exclusion of the compound of the formula  have good selective herbicidal properties when used pre- and post-emergence. The preparation of these compounds and their use as herbicidally active ingredients are described.