3,4-dihydro-2H-pyrans useful as pesticides

US4876275A · kind A · utility

Assignee

• BASF SE

Inventors

• Walter Himmele · Monsheim, DE
• Hans Theobald · Schifferstadt, DE
• Franz Merger · Bischofswerda, DE
• Ernst Hofmann
• Christoph Kuenast · Otterstadt, DE
• Peter Hofmeister · Neustadt, DE

Key dates

• Filing date: Apr 1, 1988
• Grant date: Oct 24, 1989
• Expiry date: Apr 1, 2008

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D309/30
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

3,4-dihydro-2H-pyrans of the formula I ##STR1## where R.sup.1 is C.sub.4 -C.sub.20 -alkyl, C.sub.4 -C.sub.20 -alkoxyalkyl, aryl or C.sub.7 -C.sub.20 -arylalkyl, or is aryl or C.sub.7 -C.sub.20 -arylalkyl which bears from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -haloalkoxy, R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.3 is aryl, or aryl bearing from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy or C.sub.1 -C.sub.8 -haloalkoxy, or the radical ##STR2## where R.sup.4, R.sup.5 and R.sup.6 are hydrogen or C.sub.1 -C.sub.4 -alkyl, R.sup.7 is phenyl or benzoyl, or phenyl or benzoyl bearing from one to three substituents selected from the group consisting of halogen, C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -haloalkyl, C.sub.1 -C.sub.8 -alkoxy and C.sub.1 -C.sub.8 -haloalkoxy, or a five- or six-membered heterocycle containing one or two oxygen atoms and which is either unsubstituted or substituted by one to three C.sub.1 -C.sub.8 -alkyl groups or …