Substituted 2,2-difluoro-1,3-benzodioxyl-4-ketone herbicides

US5234899A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter C. Knuppel · Wermelskirchen, DE
• Albrecht Marhold · Leverkusen, DE
• Thomas-Peter Hausner · Cologne, DE
• Hans-Joachim Santel · Leverkusen, DE
• Klaus Lurssen · Wittlich, DE
• Robert R. Schmidt · Cologne, DE
• Heinz-Wilhelm Dehne · Monheim, DE

Key dates

• Filing date: Nov 26, 1991
• Grant date: Aug 10, 1993
• Expiry date: Nov 26, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D317/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to novel substituted 2,2-difluoro-1,3-benzodioxyl-4-ketones of the general formula (I) ##STR1## in which R.sup.1 represents a group from the series comprising --CN; --CO.sub.2 R.sup.5 or ##STR2## where R.sup.3 and R.sup.4 in each case independently of one another represent hydrogen, alkyl, alkenyl, alkylcarbonyl, formyl or optionally substituted aralkyl, PA1 R.sup.5 represents alkyl and PA1 R.sup.2 represents a group from the series comprising ##STR3## or --OR.sup.3, where R.sup.3 and R.sup.4 have the abovementioned meaning, a process for their preparation and their use as plant protection agents, in particular as herbicides.