Novel 1-aryl-4-nitro-pyrazole herbicides and plant growth regulators, compositions and use

US4810283A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Reinhold Gehring · Wuppertal, DE
• Otto Schallner · Monheim, DE
• Jorg Stetter · Wuppertal, DE
• Hans-Joachim Santel · Leverkusen, DE
• Robert R. Schmidt · Cologne, DE
• Klaus Lurssen · Wittlich, DE

Key dates

• Filing date: Oct 30, 1986
• Grant date: Mar 7, 1989
• Expiry date: Oct 30, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D401/04
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Novel 1-aryl-4-nitro-pyrazoles which exhibit herbicidal and plant growth-regulating activity of the formula ##STR1## in which R.sup.1 represents in each case optionally substituted alkyl, alkenyl, alkinyl or cycloalkyl and PA0 R.sup.2 represents hydrogen, or represents in each case optionally substituted alkyl, alkenyl, alkinyl or cycloalkyl, or represents a radical ##STR2## or R.sup.1 and R.sup.2, together with the nitrogen atom to which they are bonded, represent a saturated heterocyclic radical, which can optionally contain further hetero atoms, and PA0 Ar represents in each case optionally substituted phenyl or pyridyl, wherein PA0 X represents oxygen or sulphur and PA0 R.sup.3 represents hydrogen, alkyl, alkoxy, alkoxy-alkyl, alkylthio, alkylthioalkyl, alkylamino, di-alkylamino, halogenoalkyl, alkenyl or alkinyl, or represents optionally substituted cycloalkyl, or represents optionally substituted aryl, or represents optionally substituted aryloxy, or represents optionally substituted arylthio, or represents optionally substituted arylamino, but wherein R.sup.2 only represents hydrogen or a radical ##STR3## if R.sup.1 does not simultaneously represent unsubstituted alkyl or re…