Thiophene-2-carboxylic acid derivatives, their preparation and their use for controlling undesirable plant growth

US5034049A · kind A · utility

Assignee

• BASF SE

Inventors

• Reiner Kober · Neheim, DE
• Rainer Seele
• Hans-Juergen Neubauer · Mannheim, DE
• Thomas Saupe · Sandhausen, DE
• Bruno Wuerzer · Otterstadt, DE
• Norbert Meyer · Langenburg, DE
• Karl-Otto Westphalen · Speyer, DE

Key dates

• Filing date: Jan 9, 1990
• Grant date: Jul 23, 1991
• Expiry date: Jan 9, 2010

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N43/10
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Thiophene-2-carboxylic acid derivatives of the general formula I ##STR1## where R.sup.1 to R.sup.3 are each hydrogen, halogen, branched or straight-chain C.sub.1 -C.sub.6 -alkyl, C.sub.1 -C.sub.8 -alkoxy, C.sub.1 -C.sub.6 -haloalkyl, C.sub.1 -C.sub.6 -haloalkoxy, nitro, cyano, unsubstituted phenyl or phenyl which is mono- to trisubstituted by C.sub.1 -C.sub.4 -alkyl, halogen, C.sub.1 -C.sub.5 -haloalkyl, C.sub.1 -C.sub.4 -alkoxy or C.sub.1 -C.sub.5 -haloalkoxy; PA0 X is --OR.sup.4 or --NH--OR.sup.5, PA0 R.sup.4 being branched or straight-chain C.sub.3 -C.sub.10 -alkynylalkyl which is unsubstituted or substituted by halogen; and PA0 R.sup.5 being branched or straight-chain C.sub.1 -C.sub.5 -alkyl which is unsubstituted or substituted by halogen, or branched or straight-chain C.sub.3 -C.sub.10 -alkynylalkyl which is unsubstituted or substituted by halogen; with the proviso that R.sup.4 is not propargyl when R.sup.2 and R.sup.3 are both hydrogen or when R.sup.2 is halogen or R.sup.3 is chlorine, methyl or methoxy. The compounds I are suitable for combating the growth of unwanted plants.