Quinoxaline derivatives and herbicidal composition

Details Quinoxaline derivatives and herbicidal composition Quinoxaline derivatives and herbicidal composition

1994-08-30

2001-03-06

Dentz, Bernard (Department: 1203)

Plant protecting and regulating compositions

Plant growth regulating compositions

Organic active compound containing

Reexamination Certificate

active

06197728

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to novel quinoxaline derivatives and herbicidal compositions containing the same.
2. Decsription of the Prior Arts
Various compounds have been practically used as herbicides as a result of various studies on herbicides for long years. These herbicides have been proposed and practically used to contribute for elimination of agricultural labour works and to improve productivities of agricultural and horticultural crop plants.
It has been still awaited to find novel herbicides having superior herbicidal characteristics. The herbicides for agricultural and horticultural purposes are preferably compounds which selectively control the object weeds at a small dose without a toxicity to the crop plants. The known herbicides do not always have the optimum herbicidal characteristics.
The inventors have studied to develop novel useful herbicides especially on herbicidal characteristics of various heterocyclic compounds.
Substituted pyridyloxyphenoxy fatty acid herbicides have been known as heterocyclic ether type phenoxy fatty acid derivatives in Japan Unexamined Patent Publication No. 106735/1976.
Benzimidazole, benzthiazole, and benzoxazole derivatives and herbicidal effect of these compounds have been known in Japanese Unexamined Patent Publication No. 40767/1978.
SUMMARY OF THE INVENTION
It is an object of the present invention to provide novel quinoxaline derivatives.
It is another objects of the present invention to provide a herbicidal composition which has excellent selective herbicidal activity to various weeds especially gramineous weeds but substantially non-phytotoxicity to broad leaf crop plants.
The foregoing and other objects of the present invention have been attained by providing novel compounds having the formula
wherein X represents a halogen atom; R represents —COR
1
,
—CH═CH—COOR
2
(R
2
represents a C
1
-C
4
alkyl group); —CN or —CH
2
OH, and R
1
represents
—S—R
3
(R
3
represents a C
1
-C
4
alkyl or alkenyl group or phenyl or chlorophenyl group), —NH—R
4
(R
4
represents a C
1
-C
4
alkoxy carbonylalkyl group, hydroxy alkyl group, phenyl group, C
1
-C
4
alkoxy alkyl group or di C
1
-C
4
alkyl amino group).
The present invention provides also herbicidal compositions comprising the novel quinoxaline derivative as an active ingredient.


REFERENCES:
patent: 4609396 (1986-09-01), Fawzi
patent: 4629493 (1986-12-01), Ura et al.
patent: 5364831 (1994-11-01), Ura et al.

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