Herbicidal pyrazolin-5-one derivatives, compositions and use

US5174808A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Heinz-Jurgen Wroblowsky · Langenfeld, DE
• Peter Babczinski · Wuppertal, DE
• Klaus Lurssen · Wittlich, DE
• Hans-Joachim Santel · Leverkusen, DE
• Robert R. Schmidt · Cologne, DE

Key dates

• Filing date: Nov 8, 1990
• Grant date: Dec 29, 1992
• Expiry date: Nov 8, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D409/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Herbicidal pyrazolin-5-one derivatives of the formula ##STR1## in which R.sup.1 represents alkyl, cycloalkyl, halogenoalkyl, alkenyl, alkynyl, alkenyl or alkynyl substituted by optionally substituted phenyl, halogenoalkenyl, alkoxy, alkoxyalkyl, alkylthioalkyl, alkylsulphonylalkyl, alkylsulphinylalkyl, alkoxycarbonylalkyl, in each case optionally substituted aryl, aralkyl, aryloxyalkyl or arylthioalkyl, an optionally substituted heterocycle, heterocyclylalkyl or the --NH--CO--R.sup.3 or --CO--O--R.sup.4 groups, in which R.sup.3 and R.sup.4 in each case independently of one another represent alkyl or aryl, PA0 R.sup.2 represents hydrogen, alkyl, cycloalkyl, halogenoalkyl, alkenyl, alkinyl, halogenoalkenyl, alkoxyalkyl, alkylthioalkyl, alkylsulphonylalkyl, alkylsuslphinylalkyl or alkoxycarbonylalkyl and PA0 Ar represents optionally substituted aryl or a heterocycle which is optionally substituted and optionally fused, excluding the compounds 1-(3-chlorophenyl)-3-methylthiomethyl-4-(N-hydroxyaminomethylidene)-pyrazo line-5-one, 1-(4-chlorophenyl)-3-methylthiomethyl-4-(N-hydroxyaminomethylidene)-pyrazo lin-5-one, 1-(4-trifluoronethylphenyl-3-methylthiomethyl-4-(N-hydroxyaminomethyliden…