Sulfamoylphenylureas
US5215570A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 3, 1991 |
| Grant date | Jun 1, 1993 |
| Priority date | — |
| Expiry date | Jan 3, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The N-acylsulfamoylphenylureas of formula I below are suitable as counter-agents (antidotes or safeners) for protecting cultivated plants from the phytotoxic action of herbicides. Suitable crops are preferably cereals, soybeans, sorghum, maize and rice, and suitable herbicides are sulfonylureas, chloroacetanilides and aryloxyphenoxypropionic acid derivatives. The N-acylsulfamoylphenylureas have the formula I ##STR1## wherein A is a radical selected from the group ##STR2## R.sub.1 is C.sub.1 -C.sub.4 -alkoxy or each of R.sub.1 and R.sub.2, independently of the other, is hydrogen, C.sub.1 -C.sub.8 alkyl, C.sub.3 -C.sub.8 cycloalkyl, C.sub.3 -C.sub.6 alkenyl, C.sub.3 -C.sub.6 alkynyl, ##STR3## or C.sub.1 -C.sub.4 alkyl substituted by C.sub.1 -C.sub.4 alkoxy or by ##STR4## or R.sub.1 and R.sub.2 together form a C.sub.4 -C.sub.6 alkylene bridge, or a C.sub.4 -C.sub.6 alkylene bridge interrupted by oxygen, sulfur, SO, SO.sub.2, NH or by --N(C.sub.1 -C.sub.4 alkyl)-, R.sub.3 is hydrogen or C.sub.1 -C.sub.4 alkyl, R.sub.a to R.sub.h, R.sub.x and R.sub.y are as defined in the disclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.