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WO2010034153A1 - 2-嘧啶氧(硫)基苯甲酸基烯酸酯类化合物及其应用 - Google Patents

2-嘧啶氧(硫)基苯甲酸基烯酸酯类化合物及其应用 Download PDF

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Publication number
WO2010034153A1
WO2010034153A1 PCT/CN2008/072516 CN2008072516W WO2010034153A1 WO 2010034153 A1 WO2010034153 A1 WO 2010034153A1 CN 2008072516 W CN2008072516 W CN 2008072516W WO 2010034153 A1 WO2010034153 A1 WO 2010034153A1
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Prior art keywords
compound
formula
pyrimidinyloxy
hydrazine
alkyl
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PCT/CN2008/072516
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English (en)
French (fr)
Inventor
李斌
白丽萍
崔东亮
冀海英
张弘
刘广昕
于海波
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沈阳化工研究院
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Priority to PCT/CN2008/072516 priority Critical patent/WO2010034153A1/zh
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D239/00Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
    • C07D239/02Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
    • C07D239/24Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
    • C07D239/28Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
    • C07D239/46Two or more oxygen, sulphur or nitrogen atoms
    • C07D239/60Three or more oxygen or sulfur atoms
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01NPRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/48Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
    • A01N43/541,3-Diazines; Hydrogenated 1,3-diazines

Definitions

  • the present invention belongs to the field of herbicides, and specifically relates to 2-pyrimidinyloxy(thio)benzoyl enoate compounds and uses thereof.
  • R is a hydroxyl group, a lower alkoxy group or -0-(CH 2 ) nR 3 (wherein R 3 is a lower alkoxycarbonyl group or the like, n is an integer of 1 or 2) and the like.
  • 1 ⁇ is COOR4 (hydrogen, dC 6 alkyl group, a benzyl group, alkali metal atom, an alkaline earth metal atom or an organic ammonium) and the like.
  • R is an OR 3 group ⁇ R 3 is a hydrogen atom, d 4 alkyl (wherein the alkyl group may be substituted by the following group: R'COO- (R' is a d- 8 alkyl) or d- 8 alkoxycarbonyloxy Base, etc.), C 2 -8 alkenyl or halogenated C 2 -8 alkenyl, etc.
  • An object of the present invention is to provide a novel 2-pyrimidinyloxy(thio)benzoyl enoate compound and its use as a herbicide.
  • the present invention provides a novel 2-pyrimidinyloxy(thio)benzoyl enoate compound as shown in the general formula (I) or (II):
  • X is selected from oxygen or sulfur
  • R 2 is selected from CC 3 alkyl, C 3 -C 5 alkenyl or C 3 -C 5 alkynyl;
  • R 3 is selected from CC 3 alkyl, C 3 -C 6 alkenyl or C 3 -C 6 alkynyl.
  • a more preferred compound of the present invention is in the formula (I) or ( ⁇ )
  • X is selected from oxygen or sulfur
  • R 2 is selected from dC 3 alkyl
  • R 3 is selected from the group consisting of CC 3 alkyl.
  • More preferred compounds of the invention are those of formula (I) or (II)
  • X is selected from oxygen or sulfur; Selected from H, chloro, acetyl, 4,6-dimethoxypyrimidin-2-yl or the following groups:
  • the nitrogen bond and the methyl group on the double bond are cis or trans;
  • R 2 is selected from ethyl
  • R 3 is selected from a methyl group.
  • the alkyl group represented by the formula (I) or (II) includes a linear or branched alkyl group.
  • the alkenyl group means a group having 1 to 2 carbon-carbon double bonds in a straight-chain or branched form, such as a propenyl group, an allyl group and the like.
  • An alkynyl group means a group having 1 to 2 carbon-carbon triple bonds in a straight or branched form, such as propynyl, propargyl and the like.
  • Halogen includes fluorine, chlorine, bromine, and iodine.
  • the compound of the formula (I) of the present invention can be produced by a method wherein the X, Ri R 2 and R 3 groups are as defined above. method one:
  • Compound (V) and a suitable base are added to a mixed solvent of a suitable organic solvent and water at a temperature of
  • the reaction is carried out at -10 ° C to the boiling point for 0.5 to 48 hours, and the reaction solution is acidified with hydrochloric acid or sulfuric acid to obtain an intermediate acid, Compound (VI).
  • the organic solvent is selected from the group consisting of chloroform, dichloromethane, carbon tetrachloride, n-hexane, benzene, toluene, ethyl acetate, methanol, ethanol, tetrahydrofuran or dioxane;
  • the base is selected from the group consisting of sodium hydroxide, potassium hydroxide, and carbonic acid. Sodium or potassium carbonate, etc.
  • Compound (VI) and compound (VII) (for the preparation of VII, see Synthetic Chemistry, 13(3), 315-316, (2005)) are dissolved in a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethyl methacrylate. Amide, tetrahydrofuran or dioxane; etc.
  • the alkali substance such as triethylamine, pyridine, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, etc., is favorable for the reaction, and the reaction is carried out at a temperature of -10 ° C to the boiling point for 0.5 to 48 hours to prepare a compound (1).
  • Y may be chlorine, bromine or iodine.
  • the compound (IV-1) and the compound (VII) are dissolved in a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane, etc.; and a base such as triethylamine is added.
  • a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane, etc.
  • a base such as triethylamine is added.
  • Pyridine, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate or the like is advantageous for the reaction, and the reaction is carried out at a temperature of from -10 ° C to the boiling point for 0.5 to 48 hours to obtain a compound (VIII).
  • Y may be chlorine, bromine or iodine.
  • the compound (VIII) and the compound (III) are dissolved in a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane; and a base such as triethylamine is added.
  • a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane
  • a base such as triethylamine
  • the compound of the formula (II) of the present invention can be produced by a method wherein the X, Ri R 2 and R 3 groups are as defined above. method one:
  • Compound (VI) and compound (IX) (for the preparation of IX, see CN1927811) are dissolved in a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane; Such as triethylamine, pyridine, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, etc., the reaction is favorable, the temperature is between -10 ° C and the boiling point Compound (11) is obtained in an amount of from 0.5 to 48 hours.
  • Z may be chlorine, bromine or iodine t method two:
  • the compound (IV-1) and the compound (IX) are dissolved in a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane; and a base such as triethylamine is added.
  • a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane
  • a base such as triethylamine is added.
  • Pyridine, sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, etc. have a reaction for the reaction, and the reaction is carried out at a temperature of -10 ° C to the boiling point for 0.5 to 48 hours to obtain a compound ( ⁇ ).
  • hydrazine may be chlorine, bromine or iodine.
  • the compound (X) and the compound (III) are dissolved in a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane; and a base such as triethylamine is added.
  • a suitable solvent such as toluene, acetone, hydrazine, hydrazine-dimethylformamide, tetrahydrofuran or dioxane
  • a base such as triethylamine
  • a mixture of a nitrogen-oxygen bond and a double bond may be a J ⁇ or trans compound, or a mixture of cis and trans compounds in different proportions.
  • the compound of the formula (I) or (II) of the present invention has unexpectedly high herbicidal activity compared to known alkyl ester compounds, and is effective for use in pre- and post-emergence at lower doses. Control single and double cotyled weeds. Therefore, the technical solution of the present invention includes the use of the compound of the formula (I) or (II) for controlling weeds.
  • the present invention also encompasses a herbicidal composition having the compound of the formula (I) or (II) as an active ingredient.
  • the herbicidal composition has a concentration of the active ingredient of from 5 to 90% by weight.
  • an agriculturally acceptable carrier is also included in the herbicidal composition.
  • the herbicidal compositions of the invention can be administered in a variety of formulations.
  • the compound of the present invention is usually dissolved or dispersed in a carrier to prepare a formulation to be more easily dispersed as a herbicide.
  • a carrier for example: These chemicals can be formulated as wettable powders or creams. Therefore, in these compositions, at least one liquid or solid carrier is added, and it is usually necessary to add a suitable surfactant.
  • a further embodiment of the present invention is a method of controlling weeds which comprises applying a herbicidally effective amount of the herbicidal composition of the present invention to the surface of the weed or the weed growing or the surface of the growth medium thereof.
  • a more suitable effective amount is usually selected from 10 g to 1000 g per hectare, and an effective amount is preferably 20 g to 500 g per hectare.
  • one or more additional herbicides may be added to the herbicidal compositions of the present invention, thereby providing additional advantages and benefits.
  • the compound of the present invention may be used alone or in combination with other known insecticides, fungicides, plant growth regulators or fertilizers.
  • the temperature was 40-6 (rC, after stirring for 8 hours, ethyl acetate 200 mL and water 180 mL were added to the reaction solution, and the organic phase was washed with 180 mL of a saturated aqueous solution of sodium chloride, and then anhydrous magnesium sulfate was used.
  • the original pharmaceutically acceptable acetone or dimethyl sulfoxide is dissolved, and then 1% is used.
  • the Tween 80 solution is formulated into a desired concentration of 50 mL of the test solution, and the content of acetone or dimethyl sulfoxide in the total solution is not more than 10%.
  • Spray treatment was carried out using a crawler crop sprayer (designed and manufactured by Engineering Research Ltd., UK) (spray pressure 1.95 kg/cm 2 , spray volume 50 ml/m 2 , crawler speed 30 cm/s, nozzle nozzle fan).
  • Pre-emergence test The seeds of quantitative weeds (ramie, valerian, and crabgrass) were separately planted in culture rafts with a cross-sectional area of 100 cm 2 , and the soil was covered with soil for 1 cm after sowing. The test compound was sprayed on the soil surface and placed after treatment. The greenhouse is then watered to 1%. Tween 80 was placed in tap water treatment as a control.
  • the seeds of the quantitative weeds were separately planted in a culture raft having a cross-sectional area of 100 cm 2 , and the soil was covered with lcm after sowing, and cultured in a greenhouse according to a conventional method.
  • the test materials are selected to be sprayed after the seedlings are sprayed to 1%.
  • Tween 80 was placed in tap water treatment as a control. After the test materials are treated, they are placed in a dry and ventilated place. After the liquid is naturally dried, it is placed in a greenhouse and managed according to conventional methods. 48 hours after treatment. The method of watering from the bottom is adopted to prevent the liquid from being washed away.
  • Compound 12 was selected in parallel with the known compound Kd (Compound 17 in EP0223406) for herbicidal activity. The results are shown in Table 5.

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Plant Pathology (AREA)
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Description

2-嘧啶氧 (硫) 基苯甲酸基烯酸酯类化合物及其应用 技术领域
本发明属于除草剂领域, 具体涉及 2-嘧啶氧 (硫) 基苯甲酸基烯酸酯类化合物及其 应用。
由于杂草种群的演替、变迁以及对化学农药抗药性的产生和迅速发展,人们对生态环 境保护意识的不断加强, 对化学农药污染、 农药对非靶标生物影响的认识以及在农药生 态环境中归宿问题的重视不断提高。 随着世界耕地面积的逐渐减少、 人口的不断增长及 对粮食需求量的增加, 迫使人们迅速发展农业生产技术、 改进完善耕作制度, 并需要不 断发明新型的和改进的除草化合物和组合物。
EP0223406中公开了下列 2-嘧啶氧 (硫) 基苯甲酸类化合物具有除草活性:
Figure imgf000003_0001
其中, R为羟基、 低级烷氧基或 -0-(CH2)n-R3 (其中 R3为低级烷氧羰基等, n是整数 1 或 2) 等。
EP0249708中公开了下列 2-嘧啶氧 (硫) 基苯甲酸类化合物具有除草活性:
Figure imgf000003_0002
其中, 1^为 COOR4 ( 为氢、 d-C6烷基、 苄基、 碱金属原子、 碱土金属原子或有 机铵) 等。
EP0321846中公开了下列 2-嘧啶氧 (硫) 基苯甲酸类化合物具有除草活性:
Figure imgf000003_0003
其中,
Figure imgf000003_0004
(Ri为低级烷基, n为 0-2的整数) 等。
EP0435170中公开了下列 2-嘧啶氧 (硫) 基苯甲酸类化合物具有除草活性:
Figure imgf000003_0005
其中, R为 OR3基团 {R3为氢原子、 d_4烷基(其中烷基可被以下基团取代: R'COO- (R'为 d_8烷基) 或 d_8烷氧羰基氧基等)、 C2_8烯基或卤代 C2_8烯基等 }。
现有技术中均未涉及如本发明所示的 2-嘧啶氧 (硫) 基苯甲酸基烯酸酯类化合物的 制备及其应用。
发明内容
本发明的目的是提供一种结构新颖的 2-嘧啶氧 (硫) 基苯甲酸基烯酸酯类化合物及 其作为除草剂的应用。
本发明的技术方案如下:
本发明提供了结构新颖的 2-嘧啶氧 (硫) 基苯甲酸基烯酸酯类化合物, 如通式 (I) 或 (II) 所示:
Figure imgf000004_0001
式中:
X选自氧或硫;
选自 H、 卤素、 乙酰基、 4, 6-二甲氧基嘧啶 -2-氧基或者下述基团:
其中, 氮氧键与双键上的
Figure imgf000004_0002
R2选自 C C3烷基、 C3-C5烯基或 C3-C5炔基;
R3选自 C C3烷基、 C3-C6烯基或 C3-C6炔基。
本发明较为优选的化合物为, 通式 (I) 或 (Π) 中
X选自氧或硫;
选自 H、 卤素、 乙酰基、 4, 6-二甲氧基嘧啶 -2-氧基或者下述基团:
其中, 氮氧键与双键上的
Figure imgf000004_0003
R2选自 d-C3烷基;
R3选自 C C3烷基。
本发明更为优选的化合物为, 通式 (I) 或 (II) 中
X选自氧或硫; 选自 H、 氯、 乙酰基、 4, 6-二甲氧基嘧啶 -2-氧基或者下述基团:
CH3
N n 0" R K3
其中, 氮氧键与双键上的甲基为顺式或反式;
R2选自乙基;
R3选自甲基。
通式 (I) 或 (II) 中所指的烷基包括直链或支链烷基。 烯基是指直链或支链形式, 有 1到 2个碳碳双键的基团, 例如丙烯基、 烯丙基等。 炔基是指直链或支链形式, 有 1 到 2个碳碳三键的基团, 例如丙炔基、 炔丙基等。 卤素包括氟、 氯、 溴、 碘。
本发明的通式 (I) 化合物可由如下方法制备, 式中 X、 Ri R2、 R3基团定义同前。 方法一:
Figure imgf000005_0001
(VI) (I)
将化合物 (III) (制备方法参见 Pestic. Sci. 1996, 47, 115-124) 与化合物 (IV) (制备 方法参见 J. Org. Chem. 32: 3229 (1967)) 溶于有机溶剂中, 例如甲苯、 丙酮、 Ν,Ν-二甲 基甲酰胺、 四氢呋喃或二氧六环等; 加入碱类物质, 如三乙胺、 吡啶、 氢氧化钠、 氢氧 化钾、 碳酸钠、 碳酸钾等对反应有利, 温度为 -10°C到沸点之间反应 0.5-48小时, 制得化 合物 (V)。
化合物(V)与适宜的碱, 加入到适宜的有机溶剂和水形成的混合溶剂中, 在温度为
-10°C到沸点之间反应 0.5-48 小时, 反应液经盐酸或硫酸酸化, 制得中间体酸即化合物 (VI)。 有机溶剂选自氯仿、 二氯甲烷、 四氯化碳、 正己烷、 苯、 甲苯、 乙酸乙酯、 甲醇、 乙醇、 四氢呋喃或二氧六环等; 碱选自氢氧化钠、 氢氧化钾、 碳酸钠或碳酸钾等。
化合物(VI)与化合物(VII) (VII的制备方法参见合成化学, 13(3), 315-316, (2005)) 溶于适宜的溶剂, 例如甲苯、 丙酮、 Ν,Ν-二甲基甲酰胺、 四氢呋喃或二氧六环等; 加入 碱类物质, 如三乙胺、 吡啶、 氢氧化钠、 氢氧化钾、 碳酸钠、 碳酸钾等对反应有利, 温 度为 -10°C到沸点之间反应 0.5-48小时, 制得化合物 (1)。 化合物 (VII) 中, Y可为氯、 溴或碘。
方法二:
Figure imgf000006_0001
(I)
将化合物 (IV-1 ) 与化合物 (VII) 溶于适宜的溶剂, 例如甲苯、 丙酮、 Ν,Ν-二甲基 甲酰胺、 四氢呋喃或二氧六环等; 加入碱类物质, 如三乙胺、 吡啶、 氢氧化钠、 氢氧化 钾、 碳酸钠、 碳酸钾等对反应有利, 温度为 -10°C到沸点之间反应 0.5-48小时, 制得化合 物 (VIII)。 化合物 (VII) 中, Y可为氯、 溴或碘。
将化合物(VIII)与化合物(III)溶于适宜的溶剂中, 例如甲苯、 丙酮、 Ν,Ν-二甲基 甲酰胺、 四氢呋喃或二氧六环等; 加入碱类物质, 如三乙胺、 吡啶、 氢氧化钠、 氢氧化 钾、 碳酸钠、 碳酸钾等对反应有利, 温度为 -10°C到沸点之间反应 0.5-48小时, 制得化合 物 (1)。
本发明的通式 (II) 化合物可由如下方法制备, 式中 X、 Ri R2、 R3基团定义同前。 方法一:
Figure imgf000006_0002
(VI) (II)
化合物 (VI) 与化合物 (IX) (IX的制备参见 CN1927811 ) 溶于适宜的溶剂, 例如 甲苯、 丙酮、 Ν,Ν-二甲基甲酰胺、 四氢呋喃或二氧六环等; 加入碱类物质, 如三乙胺、 吡啶、 氢氧化钠、 氢氧化钾、 碳酸钠、 碳酸钾等对反应有利, 温度为 -10°C到沸点之间反 应 0.5-48小时, 制得化合物 (11)。 化合物 (IX) 中, Z可为氯、 溴或碘 t 方法二:
Figure imgf000007_0001
(iv-i) (X)
Figure imgf000007_0002
(Π)
化合物 (IV-1 ) 与化合物 (IX) 溶于适宜的溶剂, 例如甲苯、 丙酮、 Ν,Ν-二甲基甲 酰胺、 四氢呋喃或二氧六环等; 加入碱类物质, 如三乙胺、 吡啶、 氢氧化钠、 氢氧化钾、 碳酸钠、碳酸钾等对反应有禾 I」,温度为 -10°C到沸点之间反应 0.5-48小时,制得化合物 ( Χ)。 化合物 (IX) 中, Ζ可为氯、 溴或碘。
将化合物(X)与化合物(III)溶于适宜的溶剂中, 例如甲苯、 丙酮、 Ν,Ν-二甲基甲 酰胺、 四氢呋喃或二氧六环等; 加入碱类物质, 如三乙胺、 吡啶、 氢氧化钠、 氢氧化钾、 碳酸钠、碳酸钾等对反应有禾 I」,温度为 -10°C到沸点之间反应 0.5-48小时,制得化合物(11)。
在以上所述的化合物 (I) 或 (Π) 制备过程中, 当!^选自下述基团时:
Figure imgf000007_0003
根据起始原料和反应条件的不同, 可得到氮氧键与双键上的甲基为 J ί式或反式的化 合物, 或同时含有不同比例的顺式和反式化合物的混合物。
部分通式 (I) 和 (II) 化合物的结构和物理性质见表 1和表 2。
H
Figure imgf000007_0004
表 1
化合
X Ri R2 物质性质
1 0 H CH3 无色油
Figure imgf000008_0001
2
Figure imgf000008_0002
L
(H-JV 'HI iWL '(H-JV'HZ '∞) ilZL- VZL '(Ηΐ 'Ρ) ξ0£ 9 '(Ηΐ 'P) t98S '(HI 's) i i XUZ :s) Li '(¾3 "YiZ ¾) UYV '(H£ 'S) £06 £ '(H9 'S) '(¾3 ¾£ 's) CAT 7 '(¾3 ¾£ Al£ l 0£
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9TSZ.0/800ZN3/X3d £SIW0/0I0Z OAV 合适的输导性能对药效的发挥起着重要的作用。 生物活性分子输导性能的合适性是不可 预知的, 需要大量的创造性劳动才能获知。
同已知的烷基酯类化合物相比, 本发明的通式 (I) 或 (II) 烯酸酯类化合物具有意 想不到的高除草活性, 在较低剂量下苗前、 苗后使用可有效控制单双子叶杂草。 因此本 发明的技术方案包括通式 (I) 或 (II) 化合物用于控制杂草的用途。
本发明还包括以通式 (I) 或 (II) 化合物作为活性组分的除草组合物。 该除草组合 物中活性组分的重量百分含量为 5-90%。 该除草组合物中还包括农业上可接受的载体。
本发明的除草组合物可以多种制剂的形式施用。 通常将本发明的化合物溶解或分散 于载体中配制成制剂以便作为除草剂使用时更易于分散。 例如: 这些化学制剂可被制成 可湿性粉剂或乳油。 因此, 在这些组合物中, 至少加入一种液体或固体载体, 并且通常 需要加入适当的表面活性剂。
本发明另外的实施方案为防治杂草的方法, 该方法包括将除草有效量的本发明的除 草组合物施于所述杂草或所述杂草生长的场所或其生长介质的表面上。 通常选择的较为 适宜有效量为每公顷 10克到 1000克, 优选有效量为每公顷 20克到 500克。对于某些应 用, 可在本发明的除草组合物中加入一种或多种其它的除草剂, 由此可产生附加的优点 和效果。
本发明的化合物既可以单独使用也可以和其它已知的杀虫剂、 杀菌剂、 植物生长调 节剂或肥料等一起混合使用。
应明确的是, 在本发明的权利要求所限定的范围内, 可进行各种变换和改动。
具体实施方式
下列实施例和生测试验结果可用来进一步说明本发明, 但不意味着限制本发明。 合成实例
实施例 1 : 化合物 4的合成
Figure imgf000011_0001
向 250 mL的单口圆底烧瓶中加入 4, 6-二甲氧基 -2-甲磺酰基嘧啶 7.00 g (0.036 mol), 水杨酸甲酯 6.00 g (0.047 mol), 碳酸钾 6.00 g (0.043 mol), Ν,Ν-二甲基甲酰胺 100 mL。 温度为 110-130°C, 搅拌反应 4小时后, 冷却至室温, 向反应液中加入乙酸乙酯 200 mL 和水 180 mL, 萃取, 1%稀盐酸 50 mL洗, 50 mL饱和碳酸氢钠洗, 3 X 50 mL饱和氯化 钠水溶液洗涤有机相, 无水硫酸镁干燥, 脱溶后得到的残余物经硅胶柱色谱 (石油醚 /乙 酸乙酯 =5/1 )纯化, 得到 2- (4, 6-二甲氧基 -2-嘧啶氧基)苯甲酸甲酉旨 8.35 g, 收率 80%。
Figure imgf000012_0001
向 150 mL的单口圆底烧瓶中依次加入 2- (4, 6-二甲氧基 -2-嘧啶氧基) 苯甲酸甲酯 2.93 g (0.01 mol), 四氢呋喃 50 mL,加入氢氧化钠水溶液 50 mL( 0.4g氢氧化钠溶于 50 mL 水中), 常温搅拌反应过夜。 反应完全后减压蒸出四氢呋喃。 向残余物中加入 200 mL乙 酸乙酯, 浓盐酸 2 mL, 50 mL水洗, 3 X 50 mL饱和氯化钠水溶液洗涤有机相, 无水硫酸 镁干燥, 脱溶后得 2- (4, 6-二甲氧基 -2-嘧啶氧基) 苯甲酸 2.05 g, 收率 74%。
Figure imgf000012_0002
向 100 mL的三口圆底烧瓶中依次加入 2- (4, 6-二甲氧基 -2-嘧啶氧基)苯甲酸 1.00 g (3.6 mmol), Ν,Ν-二甲基甲酰胺 30 mL,碳酸钾 0.50 g (3.6 mmol),2-溴甲基丙烯酸乙酯 0.69 g (3.6 mmol)。 温度为40-6(rC, 搅拌反应8小时后, 向反应液中加入乙酸乙酯 200 mL和 水 180 mL, 萃取, 用 180 mL的饱和氯化钠水溶液洗涤有机相, 再用无水硫酸镁干燥, 脱溶后得到的残余物经硅胶柱色谱 (石油醚 /乙酸乙酯 =3/1 ) 纯化, 得到 2- (乙氧羰基) 烯丙基 -2- (4, 6-二甲氧基 -2-嘧啶氧基) 苯甲酸酯 1.05 g, 收率 75%。
实施例 2: 化合物 9的合成
Figure imgf000012_0003
将二嘧啶氧基苯甲酸 0.44 g ( 1 mmol) 禾 P K2CO3 0.16 g ( 1.1 mmol) 置于 150 mL反 应器中, 加入 10 mL N,N-二甲基甲酰胺, 常温下搅拌 10分钟, 滴加 2-溴甲基丙烯酸乙酯 0.17 g ( l mmol)的 Ν,Ν-二甲基甲酰胺溶液, 2小时后反应结束。残余物溶于乙酸乙酯 (150 mL), 分别用水 C100 mL)洗、 3%盐酸 (;150 mL)、 饱和碳酸氢钠溶液 (;150 mL)、 饱和氯化钠 溶液 (150 mL)洗涤, 无水硫酸镁干燥有机相, 减压蒸尽溶剂, 残余物用柱色谱 (石油醚 / 乙酸乙酯 =3/1 ) 提纯得 0.12 g淡黄色油状物, 收率 23%。
实施例 3 : 化合物 16的合成
Figure imgf000013_0001
向 100 mL的三口圆底烧瓶中依次加入 6-氯 -2- (4, 6-二甲氧基 -2-嘧啶硫基) 苯甲酸 0.32 g(0.9mmol), Ν,Ν-二甲基甲酰胺 10 mL, 碳酸钾 0.17g (1.2 mmol), 4-溴丁烯酸乙酯 0.34 g (1.5 mmol)o 温度为 80°C搅拌反应 4小时后, 向反应液中加入乙酸乙酯 200 mL和 水 180 mL, 萃取, 用 200 mL的饱和氯化钠水溶液洗涤有机相, 再用无水硫酸镁干燥, 脱溶后得到的残余物经硅胶柱色谱 (石油醚 /乙酸乙酯 =3/1) 纯化, 得到 4- (6-氯 -2- (4, 6-二甲氧基 -2-嘧啶硫基) 苯甲酸基) 丁烯酸乙酯 0.28 g, 收率 71%。
实施例 4: 化合物 21的合成
Figure imgf000013_0002
将二嘧啶氧基苯甲酸 0.44 g (lmmol) 禾 P K2C030.16 g (l.l mmol) 置于 150 mL反 应器中, 加入 10mLN,N-二甲基甲酰胺, 常温下搅拌 10分钟, 滴加 4-溴丁烯酸乙酯 0.17 g (lmol)的 Ν,Ν-二甲基甲酰胺溶液, 2小时后反应结束。残余物溶于乙酸乙酯 (150 mL), 分别用水 (100 mL)洗、 3%盐酸 (150 mL)、饱和碳酸氢钠溶液 (150 mL)、饱和氯化钠溶液 (150 mL)洗涤, 无水硫酸镁干燥有机相, 减压蒸尽溶剂, 残余物用柱色谱(乙酸乙酯:石油醚 = 1 : 3作展开剂) 提纯得 0.50 g淡黄色油状物, 收率 92%。
实施例 5: 化合物 22和 23的合成
Figure imgf000013_0003
(x-i)
在 50 mL的反应瓶中加入 -2-羟基 -6-(l- (甲氧基肟)乙基)苯甲酸 0.70 g (3 mmol。制备 方法参见 Pestic. Sci.1997, 49, 76-84。未确定出氮氧键与双键上的甲基构型),丙酮 5 mL, 滴加 lmL的氢氧化钠溶液 (含 0.13 g氢氧化钠), 室温下搅拌 1小时。 减压除去溶剂, 残余物中加入 5mLN,N-二甲基甲酰胺, 搅拌下滴加 4-溴丁烯酸乙酯 0.51 g (3 mmol) 的 2mLN,N-二甲基甲酰胺溶液。 于室温下反应 2小时。 向反应溶液中加入乙酸乙酯和水各 50 mL, 再用 50 mL乙酸乙酯萃取, 有机相依次用水、 碳酸氢钠溶液、 饱和食盐水各 100 mL洗涤, 无水硫酸镁干燥后浓缩, 得到黄色油状液体。 残余物柱色谱提纯 (乙酸乙酯: 石油醚 = 1 : 6), 得无色液体 0.36 g, 收率 37%。
Figure imgf000014_0001
化合物 22 化合物 23
在 50 mL的反应瓶中加入中间体(X-1 ) 0.70 g (0.75 mmol)、 4,6-二甲氧基 -2-甲磺酸 基嘧啶 0.18 g (0.75 mmol) K2C03 0.12 g (0.75 mmol)禾 P Ν,Ν-二甲基甲酰胺 10 mL, 搅 拌下升温至 50°C左右反应 3小时。反应完全后,向反应溶液中加入乙酸乙酯和水各 50 mL, 再用 50 mL乙酸乙酯萃取, 依次用水、 碳酸氢钠溶液、 饱和食盐水各 100 mL洗涤, 无 水硫酸镁干燥后浓缩, 得到黄色油状液体。 残余物柱色谱提纯 (乙酸乙酯: 石油醚 = 1 : 4), 得到两种产物: 极性较小的为化合物 22, 黄色油状物 0.06克, 为 Z式构型, 即氮氧 键与双键上的甲基为反式; 极性较大的为化合物 23, 黄色油状物 0.13 g, 为 E式构型, 即氮氧键与双键上的甲基为顺式。 总收率 55%。
表 1和表 2中的其他化合物可通过以上类似的方法制得。
生测实例
根据待测化合物的溶解性, 原药用丙酮或二甲亚砜溶解, 然后用 1%。的吐温 80溶液 配制成所需浓度的待测液 50 mL, 丙酮或二甲亚砜在总溶液中的含量不超过 10%。
用履带式作物喷雾机 (英国 Engineer Research Ltd. 设计生产)进行喷雾处理 (喷雾压 力 1.95kg/cm2, 喷液量 50ml/m2, 履带速度 30cm/s, 喷嘴为扇形喷嘴)。
苗前试验: 将定量的杂草 (苘麻、 稗草、 马唐)种子分别播于截面积为 100cm2的培 养钵中,播后覆土 lcm,供试化合物喷雾于土壤表面,处理后置于温室,然后浇水, 以 1%。 的吐温 80静置自来水处理作为对照。
苗后试验, 将定量的杂草 (苘麻、 狗尾草、 马唐)种子分别播于截面积为 100cm2的 培养钵中, 播后覆土 lcm, 在温室按常规方法培养。待杂草长至 1.5叶期, 选取生长均匀 —致的试材进行苗后茎叶喷雾处理, 以 1%。的吐温 80静置自来水处理作为对照。 试材处 理后放在干燥通风处, 待药液自然风干后, 置于温室内按常规方法管理, 处理后 48小时 内采用从底部灌水的方法, 避免药液被冲刷。
处理后 4周进行目测调查, 抑制率为与对照相比的各种损伤程度, 包括杀死 枯斑、 扭曲、 畸形、 生长抑制或叶片灼烧等。 部分测试结果见表 3-表 8。
表 3 部分通式 (I) 或 (II) 化合物的除草活性 (苗前 /苗后, 抑制率%)
Figure imgf000015_0001
表 4 部分通式 (I) 或 (II) 化合物的除草活性 (苗后, 抑制率%)
Figure imgf000015_0002
20 20 40 0
160 98 100 60
80 95 98 55
26
40 70 100 55
20 75 100 60
选取化合物 12与已知化合物 Kd (EP0223406 中的化合物 17)进行除草活性平行 定, 结果见表 5。
表 5 化合物 12与已知化合物 的除草活性平行比较 (苗后, 抑制率%)
Figure imgf000016_0001
选取化合物 6与已知化合物 KC2 (EP 0249708 中的化合物 54)进行了除草活性平行 , 结果见表 6。
表 6 化合物 6与已知化合物 KC2的除草活性平行比较 (苗后, 抑制率%)
Figure imgf000016_0002
选取化合物 9与已知化合物 KC3 (EP0321846 中的化合物 1 ) 进行了除草活性平行 , 结果见表 7。
表 7 化合物 9与已知化合物 KC3的除草活性平行比较 (苗后, 抑制率%)
Figure imgf000016_0003
40 100
20 98
160 100
80 98
KC3
40 95
20 85
选取化合物 10与已知化合物 KC4 (EP0435170 中的化合物 9)进行了除草活性平行 , 结果见表 8。
表 8 化合物 10与已知化合物 KC4的除草活性平行比较 (苗后, 抑制率%)
Figure imgf000017_0002
已知化合物 Kd、 KC2、 KC3、 KC4的结构式如下:
Figure imgf000017_0001

Claims

利 要 求 书
1、 一种 2-嘧啶氧 (硫) 基苯甲酸基烯酸酯类化合物, 如通式 (I) 或 (II) 所示:
Figure imgf000018_0001
式中:
X选自氧或硫;
选自 H、 卤素、 乙酰基、 4, 6-二甲氧基嘧啶 -2-氧基或者下述基团:
Figure imgf000018_0002
其中, 氮氧键与双键上的甲基为顺式或反式;
R2选自 C C3烷基、 C3-C5烯基或 C3-C5炔基;
R3选自 C C3烷基、 C3-C6烯基或 C3-C6炔基。
2、 按照权利要求 1所述的化合物, 其特征在于: 通式 (I) 或 (II) 中
X选自氧或硫;
选自 H、 卤素、 乙酰基、 4, 6-二甲氧基嘧啶 -2-氧基或者下述基团:
Figure imgf000018_0003
其中, 氮氧键与双键上的甲基为顺式或反式;
R2选自 d-C3烷基;
R3选自 C C3烷基。
3、 按照权利要求 2所属的化合物, 其特征在于: 通式 (I) 或 (II) 中
X选自氧或硫;
选自 H、 氯、 乙酰基、 4, 6-二甲氧基嘧啶 -2-氧基或者下述基团:
其中, 氮氧键与双键上的
Figure imgf000018_0004
R2选自乙基;
R3选自甲基。
4、 按照权利要求 1所述的通式 (I) 或 (II) 化合物用于控制杂草的用途。
5、一种除草组合物,其特征在于:含有如权利要求 1所述的作为活性组分的通式(I) (II) 化合物和农业上可接受的载体, 组合物中活性组分的重量百分含量为 5-90%。
6、 一种控制杂草的方法, 其特征在于: 向杂草或杂草生长的场所或其生长介质的表 施用除草有效量的如权利要求 5所述的除草组合物。
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