Uracil derivatives

Details Uracil derivatives Uracil derivatives

1993-10-21

1994-10-18

Tsang, Cecilia

Plant protecting and regulating compositions

Plant growth regulating compositions

Organic active compound containing

504221, 504222, 504225, 544 3, 544 8, 544 60, 544123, 544263, 544295, 544296, 544310, 544311, 544312, 544313, 544314, A01N 4380, A01N 4702, A01N 4704, A01N 4720, C07D23954, C07D23956, C07D40110, C07D40310

Patent

active

053568630

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to a novel uracil derivative and a selective herbicide containing the derivative as an effective ingredient.


PRIOR ARTS

Many herbicides have heretofore been practically used in order to protect sugar important crops such as rice, soybean, wheat, corn, cotton, sugar, beet, etc. from weeds and to enhance productivities of these important crops. These agents may be roughly classified into three classes depending on application loci, i.e. the agent for upland field, the agent for paddy field and the agent for non-cultivated field. Further, each class can be classified to a soil incorporation treatment type, a pre-emergence soil treatment type, a post-emergence treatment (foliar treatment) type, etc., depending on methods for application of the agents.
In recent years, accompanying with a worldwide increase in population, it is clear that the productivities of the important crops have influence to food economy in respective countries. Accompanying with these changes, it is unavoidable that the form of conventional agriculture will be changed toward the 21th century. Actually, to provide for persons engaged in agriculture a herbicide which can economically and efficiently kill or control the weeds which may be obstacles to crop cultivation becomes increasingly necessary than before.
Such a herbicide is required to have the following requirements: of environmental protection, it is necessary to kill the weeds in the application amount as low as possible); problem that the agent remaining in soil for a long period damages succeeding crops, thereby it is important to show the suitable residual effect after application); from a chemical treatment, next crops can be seeded and transplanted). agriculture, it is important to make the frequency of a complicated work for controlling the weeds as fewer as possible). agent is capable of controlling weed species of different characteristics such as broad leaf weeds, grassy weeds, perennial weeds, etc. with the single agent). can be obtained by combining a soil treatment effect, a foliar treatment effect, etc.). which can selectively kill only weeds is preferred in the cultivated field where the crops and the weeds mixedly exist).
On the other hand, it has been known that specific compounds of uracil derivative show herbicidal activities. For example, bromacil has been described in The Pesticide Manual, 8th Edition, p. 89, The British Crop Protection Council (1987), etc. as one of the herbicide having an uracil structure.
Further, it has also been known that the following aryl uracil derivatives have the herbicidal activities.
For example, the compound represented by the formula: ##STR2## in which R.sup.1 represents hydrogen, C.sub.1-4 alkyl, C.sub.2-4 alkenyl, C.sub.2-4 alkynyl, C.sub.2-6 alkoxyalkyl, formyl, C.sub.2-6 alkanoyl or C.sub.2-6 alkoxycarbonyl; alkynyl or C.sub.2-6 alkoxyalkyl, bromomethyl, hydroxymethyl, (C.sub.1-5 alkoxy)methyl, (C.sub.1-5 alkylthio)methyl, cyano, nitro or thiocyanato, alternatively R.sup.5 and R.sup.6 represent tri- or tetramethylene in which one methylene group may be replaced by oxygen or sulfur and which may be optionally substituted by C.sub.1-3 alkyl, and represents C.sub.1-4 alkyl or C.sub.1-4 fluoroalkyl, and (II) when R.sup.5 represents cyano, R.sup.6 necessarily represents hydrogen or C.sub.1-4 alkyl and X necessarily represents oxygen, and a salt of the compound wherein R.sup.1 and/or R.sup.2 represent hydrogen [Japanese Patent Application Laid Open No. 61-221178 (=U.S. Pat. No. 4,746,352, U.S. Pat. No. 4,760,163)]: ##STR3## in which R.sup.1 represents hydrogen, C.sub.1-4 alkyl, C.sub.1-4 haloalkyl, formyl or C.sub.2-6 alkanoyl, (thio)carbonyloxy group or sulfonyloxy group, the residue being directly bonded to a benzene ring A through oxygen atom, alternatively R.sup.5 and R.sup.6 represent tri- or tetramethylene, and a salt of the compound wherein R.sup.1 represents hydrogen [Japanese Patent Application Laid Open No. 63-41466 (=U.S. Pat. No. 4,859,229)]:
C.sub.1-4 alkyl, C.sub.2-4 alkenyl

REFERENCES:
patent: 4859229 (1989-08-01), Wemper et al.
patent: 4941909 (1990-07-01), Wemper et al.
patent: 5041156 (1991-08-01), Suchy et al.
patent: 5084084 (1992-01-01), Satow et al.
patent: 5116404 (1992-05-01), Ishii et al.
patent: 5127935 (1992-07-01), Satow et al.
patent: 5134145 (1992-07-01), Brouwer et al.
patent: 5154755 (1992-10-01), Satow et al.
patent: 5169430 (1992-12-01), Strunk et al.
patent: 5183492 (1993-02-01), Suchy et al.

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