Combating pests with 2-carboxymethyl-3-carboxy-chromones and esters

US4285965A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans-Joachim Kabbe
• Paul-Ernst Frohberger · Leverkusen, DE
• Peter Roessler · Bensberg, DE

Key dates

• Filing date: Dec 17, 1979
• Grant date: Aug 25, 1981
• Expiry date: Dec 17, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D311/24
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

2-Carboxymethyl-3-carboxy-chromones and esters of the formula ##STR1## in which R, R.sup.1 and R.sup.2 each independently is hydrogen, an optionally substituted alkyl, alkenyl, cycloalkyl, cycloalkenyl, aralkyl or aryl group, halogen, hydroxyl, cyano or an optionally substituted alkoxy, aryloxy, aralkoxy, alkoxy-carbonyl or dialkylamino group, or PA1 R and R.sup.1, together with two carbon atoms of the benzene ring system, form a carbocyclic or heterocyclic 5-membered or 6-membered ring, and PA1 R.sup.3 is hydrogen, optionally substituted alkyl, alkenyl, cycloalkyl, cycloalkenyl or aralkyl, are characterized by fungicidal and arthropodicidal activities. The novel compounds are produced by reacting an o-hydroxyacetophenone of the formula ##STR2## with a glyoxylic acid derivative of the formula EQU OCH--COOZ in which PA1 Z is a cation, in the presence of a basic compound, followed by acidification to form the dicarboxylic acid and, optionally, the ester.