Herbicidal pyridopyridazinones and pyridopyridazinethiones

US5405826A · kind A · utility

Assignee

• Rhone-Poulenc Agriculture Ltd. · GB

Inventors

• Richard H. Hewett · Oak Bluff, CA
• Simon N. Pettit · Witham, GB
• Philip H. G. Smith · Witham, GB

Key dates

• Filing date: Jan 13, 1993
• Grant date: Apr 11, 1995
• Expiry date: Jan 13, 2013

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A01N43/90
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Pyrido[2,3-d]pyridazin-5-one and pyrido[2,3-d]pyridazin-5-thione derivatives of general formula (I): ##STR1## wherein R and R.sup.1 independently represent hydrogen, optionally halogenated alkyl, alkenyl or alkynyl, optionally substituted heterocycle or a group --[CR.sup.41 R.sup.42 ].sub.n -(phenyl)-(R.sup.3).sub.q ; PA1 R.sup.2 represents halogen, optionally halogenated alkyl, alkenyl or alkynyl, CN; --CO.sub.2 R.sup.4 ; --S(O).sub.r R.sup.4 ; --NO.sub.2 ; --NR.sup.41 R.sup.42 ; --OH; --COR.sup.4, --S(O).sub.r R.sup.5, --CO.sub.2 R.sup.5, --OR.sup.5 ; --CONR.sup.41 R.sup.42, --OSO.sub.2 R.sup.5, --OSO.sub.2 R.sup.6, --OCH.sub.2 R.sup.5, --N(R.sup.41)COR.sup.6, --N(R.sup.41)SO.sub.2 R.sup.5, --N(R.sup.41)SO.sub.2 R.sup.6, --SO.sub.2 NR.sup.41 R.sup.42, optionally substituted phenyl, alkoxy or haloalkoxy; PA1 X represents oxygen or sulphur; PA1 R.sup.3 represents halogen, optionally halogenated alkyl, alkenyl, alkoxy, alkynyl, --OH, --S(O).sub.r R.sup.4, --CO.sub.2 R.sup.4, COR.sup.4, --CN, --NO.sub.2, --NR.sup.41 R.sup.42, --OR.sup.5 ; --CONR.sup.41 R.sup.42, --OSO.sub.2 R.sup.5, --OSO.sub.2 R.sup.6, --OCH.sub.2 R.sup.5, --N(R.sup.41)COR.sup.6, --N(R.sup.41)SO.sub.2 R.sup.5, --N(R…