Pyrazine-4-carbamate or -urea derivatives as herbicides

Patent metadata

Field	Value
Publication number	US-11678665-B2
Application number	US-201816649621-A
Country	US
Kind code	B2
Filing date	Sep 18, 2018
Priority date	Sep 22, 2017
Publication date	Jun 20, 2023
Grant date	Jun 20, 2023

Abstract

The present invention relates to herbicidal) active pyridyl-/pyrimidyl-pyrazine derivatives, as well as to processes and intermediates used for the preparation of such derivatives. The invention further extends to herbicidal compositions comprising such derivatives, as well as to the use of such compounds and compositions in controlling undesirable plant growth: in particular the use in controlling weeds, in crops of useful plants.

First claim

The invention claimed is:

1. A compound of formula (I)

or a salt thereof,
wherein:
X 1 is N or CR 1 ;
R 1 is selected from the group consisting of halogen and cyano;
R 2 is selected from the group consisting of halogen, cyano, C 1 -C 6 alkyl and C 1 -C 6 haloalkyl;
R 3 is —C(O)C 1 -C 6 alkyl, or —C(O)C 1 -C 3 alkoxyC 1 -C 3 alkyl;
R 4 is selected from the group consisting of hydrogen, C 1 -C 4 alkyl, C 1 -C 3 haloalkyl and —C(O)R 9 ;
each R 9 is independently selected from the group consisting of hydrogen, methyl, ethyl, propyl, butenyl, —C 1 -C 3 alkoxyC 1 -C 3 alkyl, and —(CH 2 ) 2 C(O)OR c ; and
R c is hydrogen or C 1 -C 4 alkyl.

2. The compound of formula (I) according to claim 1 , wherein X 1 is N.

3. The compound of Formula (I) according to claim 1 , wherein X 1 is CR 1 and R 1 is selected from the group consisting of fluoro, chloro, and cyano.

4. The compound of Formula (I) according to claim 1 , wherein R 2 is cyano, methyl or trifluoromethyl.

5. The compound of Formula (I) according to claim 1 , wherein R 4 is —C(C)R 9 .

6. The compound of Formula (I) according to claim 1 , wherein R 4 is hydrogen or methyl.

7. A herbicidal composition comprising a compound of Formula (I) as defined in claim 1 and an agriculturally acceptable formulation adjuvant.

8. The herbicidal composition according to claim 7 , further comprising at least one additional pesticide.

9. A method of controlling grassy weeds at a locus comprising application to the locus of a grassy weed controlling amount of a compound of formula (I) as defined in claim 1 .

10. A compound selected from the group consisting of:

Assignees

• Syngenta Participations Ag

Inventors

• Wailes Jeffrey Steven
• Carter Neil Brian
• Clough John Martin
• Williams John

Classifications

• C07D401/04 Primary

  directly linked by a ring-member-to-ring-member bond · CPC title

• A01N43/60 Primary

  1,4-Diazines; Hydrogenated 1,4-diazines · CPC title