Patent · US Expired

N-heteroaryl-N'-(pyrid-2-ylsulfonyl)ureas, processes for their preparation, and their use as herbicides and plant growth regulators

US5714436A · kind A · utility

0Cited by

6References

9Claims

0Family size

Assignee

Hoechst Schering Agrevo GmbH · DE

Inventors

Klaus Bernhard Haaf · Kelkheim, DE
Heinz Kehne · Hofheim, DE
Klaus Bauer · Rodgau, DE
Hermann Bieringer · Eppstein, DE

Key dates

Filing date	Mar 22, 1996
Grant date	Feb 3, 1998
Priority date	—
Expiry date	Mar 22, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D521/00
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

Compounds of the formula (I) or salts thereof ##STR1## in which R.sup.1 -R.sup.4, W, A, n and m are as defined in claim 1, for example PA1 R.sup.1 and R.sup.2 are H, (substituted) alkyl, (substituted) alkenyl or alkynyl, (substituted) cycloalkyl, (substituted) aryl or acyl and PA1 A is (substituted) pyrimidinyl or triazinyl are suitable as selective sulfonylurea herbicides and plant growth regulators. (I) is prepared analogously to known processes via intermediates, some of which are novel, for example via suitably substituted pyridylsulfonamides (II) and N-tert-butylsulfonamides (VIII) as claimed in claim 5.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.