Phenylsulfonylureas, processes for their preparation, and their use as herbicides and plant growth regulations

US6239306A · kind A · utility

Assignee

• Hoechst Schering Agrevo GmbH · DE

Inventors

• Klaus Lorenz · Worms, DE
• Lothar Willms · Hillscheid, DE
• Klaus Bauer · Rodgau, DE
• Hermann Bieringer · Eppstein, DE

Key dates

• Filing date: Feb 1, 1999
• Grant date: May 29, 2001
• Expiry date: Feb 1, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C311/46
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula (I) and their salts as defined in claim 1, ##STR1## in which PA1 R.sup.1 is CO--Q--R.sup.8, where R.sup.8 =H or R PA1 R.sup.2 and R.sup.3 are H or (C.sub.1 -C.sub.4)alkyl, PA1 R.sup.4 is H, R, RO, OH, RCO, RSO.sub.2, PhSO.sub.2 PA1 R.sup.5 is RSO.sub.2, PhSO.sub.2, PhCO, RNHSO.sub.2, R.sub.2 NSO.sub.2, RCO, CHO, COCOR', CW--T--R.sup.9, CW--NR.sup.10 R.sup.11, CW--N(R.sup.12).sub.2 or PA1 R.sup.4 and R.sup.5 together are the chain (CH.sub.2).sub.m B or --B.sup.1 --(CH.sub.2).sub.m1 B-- where B=SO.sub.2, m=3, 4; m.sup.1 =2, 3; PA1 T and W=O, S; Q=O, S, NR.sup.13 where R.sup.13 =H, R; PA1 R.sup.6 =H, R, RO, RCO, ROCO, Hal, NO.sub.2, CN; PA1 R.sup.7 =H, CH.sub.3 ; R.sup.9 =R; R.sup.10, R.sup.11 =H, R; N(R.sup.12).sub.2 =heterocycle PA1 A=pyrimidinyl and triazinyl radical or an analog thereof, where R=(substituted) aliphatic hydrocarbon radical, are suitable as selective herbicides. They are prepared by analogous processes via sulfonamides, some of which are new, of the formula (II) (see claim 4).