WO2015081493A1 - 新型除草活性的嘧啶水杨酸类化合物、其制备方法及其作为除草剂的用途 - Google Patents
新型除草活性的嘧啶水杨酸类化合物、其制备方法及其作为除草剂的用途 Download PDFInfo
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- WO2015081493A1 WO2015081493A1 PCT/CN2013/088411 CN2013088411W WO2015081493A1 WO 2015081493 A1 WO2015081493 A1 WO 2015081493A1 CN 2013088411 W CN2013088411 W CN 2013088411W WO 2015081493 A1 WO2015081493 A1 WO 2015081493A1
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- salicylic acid
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- pyrimidine salicylic
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic 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
- C07D239/28—Heterocyclic 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
- C07D239/46—Two or more oxygen, sulphur or nitrogen atoms
- C07D239/60—Three or more oxygen or sulfur atoms
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION 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
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/54—1,3-Diazines; Hydrogenated 1,3-diazines
Definitions
- the present invention relates to a novel herbicidal active pyrimidine salicylic acid compound, and more particularly to a novel herbicidal 2,6-bis((4,6-dimethoxypyrimidin-2-yl) group.
- Alkyl benzoic acid imidate derivative a process for its preparation and its use as a herbicide.
- pyrimidine salicylic herbicides were first discovered and developed by Japanese combinatorial chemistry.
- the first commercial herbicide Bispyribac-sodium (CN 1035292A), and subsequently developed rice field herbicides.
- Pyrimidine salicylic acid herbicides, and then the compounds disclosed in these references have disadvantages in that they have low herbicidal properties, narrow herbicidal spectrum, poor selectivity, and the like.
- pyrimidine salicylic acid herbicides with a high degree of safety, broad-spectrum effects, environmental friendliness, low toxicity, and human safety which have broad application prospects in the field of pesticides, have not been reported yet.
- the object of the present invention is to provide a novel herbicidal active pyrimidine salicylic acid compound in view of the deficiencies in the prior art.
- Still another object of the present invention is to provide a process for preparing a novel herbicidal active pyrimidine salicylic acid compound.
- Another object of the present invention is to provide a novel herbicidal active pyrimidine salicylate compound.
- the technical solution adopted by the present invention is: a novel herbicidal active pyrimidine salicylic acid compound, wherein the pyrimidine salicylic acid compound is 2,6-double represented by the following formula (I) ((4,6-Dimethoxypyrimidin-2-yl;)oxy)benzoic acid imide derivative:
- R represents an ortho, meta, or para-trifluoromethyl group or is hydrogen.
- the R is an ortho, meta and para-trifluoromethyl group.
- Step A Preparation of substituted acetophenone oxime: Hydroxylamine hydrochloride and substituted acetophenone are used as raw materials, solvent alcohol and inorganic base are added as catalysts, and the reaction is carried out at a temperature of 0 ° C to 65 ° C for 1 to 5 hours. After treatment, the substituted acetophenone oxime;
- Step B Preparation of 0-[2,6-bis(4,6-dimethoxy-2-pyrimidinyl)oxy](substituted acetophenone) oxime: 2, 6-bis (4, 6 -Dimethoxy-2-pyrimidinyl-2-oxy)benzoic acid and the above-mentioned substituted trifluoromethylacetophenone oxime starting material, reacted at room temperature for 10 24 hours under the action of an organic solvent, a catalyst and a dehydrating agent, the reaction After the completion of the filtration, the filtrate is distilled off under reduced pressure to recover the organic solvent, thereby obtaining the target compound pyrimidine salicylic acid compound 0-[2,6-bis(4,6-dimethoxy-2-pyrimidinyl)oxy (Substituted acetophenone) hydrazine.
- the solvent alcohol is methanol, ethanol, isopropanol, n-butanol, n-propanol.
- the inorganic base is sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate or potassium carbonate
- the organic solvent is dichloromethane, chloroform, 1,2-dichloroethane. , acetone, acetonitrile, tetrahydrofuran, dioxane, N, N-dimethylformamide, methyl acetate, ethyl ester ethyl ester, propyl acetate, butyl ethoxide, etc.
- the catalyst in step B is : 4-dimethylaminopyridine (DMAP), 4-(anthracene-tetrahydropyrrole)pyridine (4-indole).
- the dehydrating agent is hydrazine, ⁇ '-dicyclohexylcarbodiimide (DCC), hydrazine, ⁇ '-diisopropylcarbodiimide (DIC).
- DCC ⁇ '-dicyclohexylcarbodiimide
- DIC ⁇ '-diisopropylcarbodiimide
- the technical solution adopted by the present invention is: the pyrimidine salicylic acid compound is Application in the preparation of herbicides.
- the herbicide is used for controlling Echinoch a crusgalli, Leptochloa chinensis, Monochora vaginalis, Ammannia baccifera, Ludwigia prostrata, and squash (Rotala indicd) 0
- the present invention provides a series of pyrimidine salicylic acid compounds with high and safe herbicidal activity, which is very effective for controlling weeds such as valerian, Qianjin, ragweed, water leek, clove, and vegetables. Spectrum effect, at the same time environmentally friendly, low toxicity, safe for humans;
- a preparation technique for efficiently and safely herbicidal pyrimidine salicylic acid compound is provided, and the pyrimidine salicylic acid compound of the present invention can be prepared in a large amount, and the yield is high and the purity is good.
- the present invention relates to a novel herbicidal 2,6-bis((4,6-dimethoxypyrimidin-2-yl)oxy group;) benzoic acid urethane derivative represented by the following formula (I)
- R H, o, m, p-CF 3 (wherein R) represents o-, m-, p-trifluoromethyl or hydrogen.
- the compound R of the compound of the formula (I) of the present invention is an ortho, meta- or para-trifluoromethyl group.
- HP-001 0-[2,6-bis(4,6-dimethoxypyrimidin-2-yloxy)benzoyl](2-trifluoromethyl)acetophenone oxime
- HP-002 0-[2,6-bis(4,6-dimethoxypyrimidin-2-yloxy)benzoyl](3-trifluoromethyl)acetophenone oxime
- HP-003 0-[2,6-bis(4,6-dimethoxypyrimidin-2-yloxy)benzoyl](4-trifluoromethyl)acetophenone oxime.
- the present invention also provides a method for preparing a pyrimidine salicylic acid compound by using a substituted acetophenone or 2,6-bis(4,6-dimethoxy-2-pyrimidin-2-yloxy)benzoic acid as a raw material.
- the synthesis process is shown in Figure 1.
- Step A Preparation of substituted acetophenone oxime.
- the hydroxylamine hydrochloride and the substituted acetophenone are used as raw materials, and the solvent alcohol and the inorganic base are added as catalysts, and the reaction is carried out at a temperature of 0 ° C to 65 ° C for 1 to 5 hours, and then the substituted acetophenone oxime is treated.
- Step B Preparation of 0-[2,6-bis(4,6-dimethoxy-2-pyrimidinyl)oxy](substituted acetophenone) oxime 2,6-bis(4,6- Dimethoxy-2-pyrimidinyl-2-oxy)benzoic acid and the above-mentioned substituted trifluoromethylacetophenone oxime starting material, reacted at room temperature for 10 24 hours under the action of an organic solvent, a catalyst and a dehydrating agent, and the reaction is finished.
- the filtrate is distilled off under reduced pressure to recover the organic solvent to obtain the target compound pyrimidine salicylic acid compound 0-[2,6-bis(4,6-dimethoxy-2-pyrimidinyl)oxyl. ] (Substituted acetophenone) hydrazine.
- the solvent alcohol is methanol, ethanol, isopropanol, n-butanol, n-propanol.
- the inorganic base is sodium hydroxide, potassium hydroxide, lithium hydroxide, sodium carbonate, potassium carbonate
- the organic solvent is dichloromethane, chloroform, 1,2-dichloroethane, acetone, acetonitrile, tetrahydrofuran, dioxane, N, N-dimethylformamide, methyl acetate, ethyl acetate Ester, propyl acetate, butyl glycol, etc.
- the catalyst in the step B is: 4-dimethylaminopyridine (DMAP), 4-(anthracene-tetrahydropyrrole)pyridine (4-PPY;).
- the dehydrating agent ⁇ , ⁇ '-dicyclohexylcarbodiimide (DCC), hydrazine, ⁇ '-diisopropylcarbodiimide (DIC).
- DMAP 4-dimethylaminopyridine
- DCC 4-(anthracene-tetrahydropyrrole)pyridine
- DIC ⁇ '-dicyclohexylcarbodiimide
- the invention provides a pyrimidine salicylic acid compound prepared by using a substituted acetophenone, hydroxylamine hydrochloride, 2,6-bis(4,6-dimethoxy-2-pyrimidin-2-yloxy)benzoic acid as a raw material.
- the preparation method is suitable for mass production of the safe and efficient broad spectrum herbicidal pyrimidine sal
- the pyrimidine salicylic acid compound of the present invention has good herbicidal activity and can be used as an effective active ingredient of a herbicide to prepare various agricultural chemical forms such as wettable powders, emulsions, water-dispersible granules, tablets, granules and the like.
- the herbicidal activity test was carried out using various herbicides prepared by the present invention, and the results were as follows:
- An analytical drug is used to weigh a certain amount of pyrimidine salicylate, and dissolved in a solvent (acetone, DMF or DMSO, etc.) to prepare a 1.0-5.0% cream preparation, and then use 0.15-0.25% TW. -80 of distilled water diluted to a certain concentration, spare.
- a solvent acetone, DMF or DMSO, etc.
- the weed seeds were divided into single and dicotyledons, which were evenly spread into a 9 cm inner diameter pot and cultured in a greenhouse.
- the post-stem leaves are treated on an automatic spray device. Every The treatment was repeated 3 times, and a blank control was set up. After the treatment, it was allowed to stand for 4-5 hours. After the liquid on the leaves was dried, it was transferred to a greenhouse for cultivation. Observe the growth of the plants every day, record the symptoms of the damage regularly, and visually investigate the comprehensive herbicidal activity in the symptoms of the phytotoxicity.
- the invention synthesizes trifluoromethylacetophenone pyrimidine salicylic acid compounds for the first time in the world, and has obvious new Characterization and creativity, the present invention measures the activity of pyrimidine salicylic acid compounds on herbicides such as valerian, sage, ragweed, water leek, clove stalk, and squash, among which pyrimidine salicylic acid HP-
- herbicides such as valerian, sage, ragweed, water leek, clove stalk, and squash
- pyrimidine salicylic acid HP- The herbicidal activities of the pyrimidine salicylic acid compounds of the present invention are 003, the activity of the pyrimidine salicylic acid compounds of the present invention are 100, 99, 98, 100, 100, 95, respectively. Higher herbicidal activity than the control products penoxsulam and pyrithione, pyrimidine salicylate, has significant utility in modern agricultural production.
- the present invention has been extensively studied on pyrimidine salicylic acid compounds, and aims to study a compound having good herbicidal selectivity and deductive activity, and found that fluorine is introduced at a specific position of a pyrimidine salicylic acid compound.
- the substituent that is, the pyrimidine salicylic acid compound represented by the general formula (I) of the present invention exhibits excellent selective herbicidal properties against perennial weeds and one-year weeds, and the pyrimidine water represented by the general formula (I) Salicylic acid compounds are highly safe against rice crops, low in toxicity to humans and other organisms, and environmentally friendly.
- the pyrimidine salicylic acid compound represented by the general formula (I) has excellent herbicidal activity against grass weeds, broadleaf weeds, annual weeds and perennial weeds at an effective concentration thereof, and is useful for crops such as rice. , wheat, cotton, etc. are not phytotoxic.
- the compounds of the present invention in rice fields can completely control annual or perennial weeds at very low concentrations, including valerian, crabgrass, red-footed pheasant, double-spotted hawksbill, sage, etc., while having good safety to rice crops and Environmentally friendly. Suitable for rice field crops.
- the pyrimidine salicylic acid compounds of the present invention are excellent in herbicidal selectivity and herbicidal activity, as compared with all the compounds indicated in the European patents (EP 658549 A1) and Chinese patents (CN 1111623), especially in In the rice crop, the control selectivity against valerian is better than that of the former, and the pyrimidine salicylic acid compound of the present invention has a broad-spectrum herbicidal range, and they can suppress valerian, sage, and ragweed at a relatively low dose control.
- the pyrimidine salicylic acid compound of the present invention is highly safe against rice crops, and is generally difficult to control weeds such as water leek, clove stalk, and squash, and the dose required for effective weed control is low. It is very effective against weeds such as valerian and Qiangjin. It has a broad-spectrum effect, is environmentally friendly, low-toxic, safe for humans, and has broad application prospects in the field of pesticides.
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Abstract
一种具有除草活性的嘧啶水杨酸类化合物、其制备方法及其作为除草剂的用途,所述化合物为2,6-双((4,6-二甲氧基嘧啶基-2-基)氧基)苯甲酸亚氨酯衍生物,能有效防除稗草、千金子、鸭舌草、水苋菜、丁香蓼、节节菜等杂草,具有广谱效果,同时对环境友好、低毒,对人类安全。
Description
新型除草活性的嘧啶水杨酸类化合物、 其制备方法及其作为除草剂的用途 技术领域
本发明涉及一种新型除草活性的嘧啶水杨酸类化合物, 更具体地说, 本发明涉及一 种新型除草的 2,6-双((4,6-二甲氧嘧啶基 -2-基)氧基)苯甲酸亚氨酯衍生物, 其制备方法及 其作为除草剂的用途。
背景技术
上世纪八十年代末, 嘧啶水杨酸类除草剂由日本组合化学最早发现并开发了第一个 商品化除草剂双草醚 (Bispyribac-sodium) (CN 1035292A) 及随后开发的水稻田除草剂 嘧草醚 (Pyriminobac-methyl ) (JP 04368361) , 韩国 LG 化学公司开发的嘧啶肟草醚 ( pyribenzoxim) (EP 658549 A1, CN 1111623 ) , 上海有机化学所等开发的丙酯草醚 (CN112793C) 等嘧啶水杨酸类除草剂, 然后这些参考文献中所揭示的化合物的缺点在 于它们的除草性能不高、 除草谱窄、 选择性差等。 但是关于一种具有高度的安全性, 具 有广谱效果, 同时对环境友好, 低毒, 对人类安全, 在农药领域具有广泛的应用前景的 嘧啶水杨酸类除草剂目前还未见报道。
发明内容
本发明的目的是针对现有技术中的不足, 提供一种新型除草活性的嘧啶水杨酸类化 合物。
本发明的再一的目的是, 提供一种新型除草活性的嘧啶水杨酸类化合物的制备方 法。
本发明的另一的目的是, 提供一种新型除草活性的嘧啶水杨酸类化合物的应用。 为实现上述目的, 本发明采取的技术方案是: 一种新型除草活性的嘧啶水杨酸类化 合物, 所述的嘧啶水杨酸类化合物为如下通式 (I) 所表示的 2,6-双 ((4,6-二甲氧嘧啶基 -2-基;)氧基)苯甲酸亚氨酯衍生物:
R=H, o,m,p-CF3 (工)
其中 R表示邻、 间、 对位三氟甲基或为氢。
优选的, 所述的 R为邻、 间、 对位三氟甲基。
为实现上述第二个目的, 本发明采取的技术方案是: 一种权利要求 1所述的嘧啶水 杨酸类化合物的制备方法, 包括以下步骤:
步骤 A: 取代苯乙酮肟的制备: 以盐酸羟胺和取代基苯乙酮为原料, 加入溶剂醇和 无机碱作催化剂, 在 0°C~65°C温度条件下进行反应, 反应 1~5小时后, 经处理得取代苯 乙酮肟;
步骤 B: 0-[2,6-双 (4,6-二甲氧基 -2-嘧啶基)氧基] (取代基苯乙酮)肟的制备: 以 2, 6- 双(4, 6-二甲氧 -2-嘧啶基 -2-氧基)苯甲酸和上述取代三氟甲基苯乙酮肟原料, 在有机溶 剂、 催化剂和脱水剂作用下, 在常温下反应 10 24小时, 反应结束后过滤, 滤液在减压 下蒸除回收有机溶剂, 即得目标物化合物嘧啶水杨酸类化合物 0-[2,6-双 (4,6-二甲氧基 -2- 嘧啶基)氧基] (取代基苯乙酮)肟。
优选的, 所述的溶剂醇为甲醇、 乙醇、 异丙醇、 正丁醇, 正丙醇。
优选的, 所述的无机碱为氢氧化钠、 氢氧化钾、 氢氧化锂、 碳酸钠、 碳酸钾 优选的, 所述的有机溶媒二氯甲烷、 三氯甲烷、 1, 2-二氯乙烷、 丙酮、 乙腈、 四氢 呋喃、 二氧六环、 N, N-二甲基甲酰胺, 乙酸甲酯、 乙酯乙酯、 乙酸丙酯、 乙醇丁酯等 优选的, 所述的步骤 B 中催化剂为: 4-二甲氨基吡啶 (DMAP)、 4-(Γ-四氢吡咯)吡 啶 (4-ΡΡΥ)。
优选的, 所述的脱水剂为 Ν, Ν'-二环己基碳二亚胺(DCC)、 Ν,Ν'-二异丙基碳二酰亚 胺 (DIC)。
为实现上述第三个目的, 本发明采取的技术方案是: 所述的嘧啶水杨酸类化合物在
制备除草剂中的应用。
优选的, 所述的除草剂用于防除稗草 (Echinoch a crusgalli) , 千金子 Leptochloa chinensis)、 鸭舌草 ( Monochora vaginalis )、 水览菜 {Ammannia baccifera)、 丁香 (Ludwigia prostrata)、 节节菜 (Rotala indicd) 0
本发明优点在于:
1、 本发明提供了一系列具有高效安全除草活性的嘧啶水杨酸类化合物, 对防除稗 草、 千金子、 鸭舌草、 水苋菜、 丁香蓼、 节节菜等杂草非常有效, 具有广谱效果, 同时 对环境友好, 低毒, 对人类安全;
2、 提供了一种高效安全具有除草活性的嘧啶水杨酸类化合物的制备技术, 能大量 制备本发明的嘧啶水杨酸类化合物, 收率高, 纯度好。
附图说明
图 1. 本发明的嘧啶水杨酸类化合物的合成路线。
具体实施方式
下面结合附图对本发明提供的具体实施方式作详细说明。
本发明涉及如下通式 (I)所表示的一种新型除草的 2,6-双 ((4,6-二甲氧嘧啶基 -2-基)氧 基;)苯甲酸亚氨酯衍生
R=H, o,m,p-CF3 (工) 其中 R表示邻、 间、 对位三氟甲基或为氢。
优选的, 本发明的式 (I) 的化合物的中 R为邻、 间、 对位三氟甲基。
其化学名称、 化学结构式分别如下:
HP-001 : 0-[2, 6-双 (4,6-二甲氧嘧啶基 -2-基氧基)苯甲酰基] (2-三氟甲基)苯乙酮肟, HP-002 : 0-[2, 6-双 (4,6-二甲氧嘧啶基 -2-基氧基)苯甲酰基] (3-三氟甲基)苯乙酮肟,
HP-003 : 0-[2, 6-双 (4,6-二甲氧嘧啶基 -2-基氧基)苯甲酰基] (4-三氟甲基)苯乙酮肟。 本发明同时提供一种以取代苯乙酮、 2, 6-双 (4, 6-二甲氧 -2-嘧啶基 -2-氧基) 苯甲 酸等为原料制备嘧啶水杨酸类化合物的方法, 其合成工艺如图 1所示。
包括以下步骤:
步骤 A: 取代苯乙酮肟的制备。
以盐酸羟胺和取代基苯乙酮为原料, 加入溶剂醇和无机碱作催化剂, 在 0°C~65°C温 度条件下进行反应, 反应 1~5小时后, 经处理得取代苯乙酮肟。
步骤 B: 0-[2,6-双 (4,6-二甲氧基 -2-嘧啶基)氧基] (取代基苯乙酮)肟的制备 以 2, 6-双 (4, 6-二甲氧 -2-嘧啶基 -2-氧基) 苯甲酸和上述取代三氟甲基苯乙酮肟原 料, 在有机溶剂、 催化剂和脱水剂作用下, 在常温下反应 10 24小时, 反应结束后过滤, 滤液在减压下蒸除回收有机溶剂, 即得目标物化合物嘧啶水杨酸类化合物 0-[2,6-双 (4,6- 二甲氧基 -2-嘧啶基)氧基] (取代基苯乙酮)肟。
所述的溶剂醇为甲醇、 乙醇、 异丙醇、 正丁醇, 正丙醇。
所述的无机碱为氢氧化钠、 氢氧化钾、 氢氧化锂、 碳酸钠、 碳酸钾
所述的有机溶媒二氯甲烷、 三氯甲烷、 1, 2-二氯乙烷、 丙酮、 乙腈、 四氢呋喃、 二 氧六环、 N, N-二甲基甲酰胺, 乙酸甲酯、 乙酯乙酯、 乙酸丙酯、 乙醇丁酯等
所述的步骤 B中催化剂为: 4-二甲氨基吡啶(DMAP)、 4-(Γ-四氢吡咯)吡啶 (4-PPY;)。 所述的脱水剂: Ν, Ν'-二环己基碳二亚胺 (DCC)、 Ν,Ν'-二异丙基碳二酰亚胺 (DIC)。 本发明提供的以取代基苯乙酮、 盐酸羟胺、 2, 6-双 (4, 6-二甲氧 -2-嘧啶基 -2-氧基) 苯甲酸等为原料制备嘧啶水杨酸类化合物的制备方法, 适于大量制备本发明的安全高效 广谱具有除草活性的嘧啶水杨酸类化合物。
实施例 1: 2-三氟甲基苯乙酮肟的制备
在 500 ml反应瓶中加入盐酸羟胺 (8.3 g, 120 mmol)、 甲醇 (150 ml)、 20%氢氧化 钠水溶液(24.0 g, 120 mmol)、 2-三氟甲基苯乙酮(17.4 g, 100 mmol), 在氮气保护 25°C 下反应 3小时, 反应结果后, 在减压下蒸除甲醇, 加入水, 过滤得固体 2-三氟甲基苯乙 酮肟 18.1g, 收率 89.1%, 熔点: 110.5-112.5°C。
实施例 2: 0-[2, 6-双 (4,6-二甲氧嘧啶基 -2-基氧基)苯甲酰基] (2-三氟甲基)苯乙酮肟 (HP-001) 的制备
在 500 ml反应瓶中加入 2, 6-双 (4, 6-二甲氧 -2-嘧啶基 -2-氧基) 苯甲酸 (21.5 g, 50 mmol ) 2-三氟甲基苯乙酮肟 ( 10.2 g, 50.2 mmol ) DCC ( 10.7 g, 50.6 mmol ) DMAP (0.60 g, 5 mmol)、 二氯甲烷 300毫升, 在氮气保护下, 室温下反应 10小时, 反应结果
后, 过滤, 滤液在减压下浓缩回收二氯甲烷, 用甲醇重结晶,得白色晶体 0-[2, 6-双 (4,6- 二甲氧嘧啶基 -2-基氧基)苯甲酰基] (2-三氟甲基)苯乙酮肟 23.6 g, 收率 76.7%, 熔点: 83.3-85.2°C。
H1 MR: (400 Hz, CDC13), 5(ppm), 8.037(t, IH, Ph-CH), 7.689 (t, IH, Ph-CH), 7.578(d, IH, ]=7.2 Hz, Ph-CH), 7.562(d, IH, J=5.2 Hz, Ph-CH), 7.503(d, IH, J=4.2 Hz, Ph-CH), 7.213(d, 2H, J=7.2 Hz, Ph-CH), 5.757 (s, 2H, Pyrimidine CH), 3.797 (s, 12H, 4xCH30), 2.297 (s, 3H, CH3)。
C13 MR: (400 Hz, CDC13), δ (ppm), 172.89(4C), 163.79, 160.38(2C), 152.87, 151.93(2C), 132.48, 132.20, 132.06, 131.58, 131.23, 130.86, 129.48, 129.23, 128.70, 125.92, 124.66, 120.62, 119.07, 84.97, 54.18(4C)。
实施例 3: 3-三氟甲基苯乙酮肟的制备
在 500 ml反应瓶中加入盐酸羟胺 (6.9 g, 100 mmol)、 乙醇 (250 ml)、 20%氢氧化 钠水溶液(20.0 g, 100 mmol)、 3-三氟甲基苯乙酮(17.4 g, 100 mmol), 在氮气保护 25°C 下反应 2小时, 反应结果后, 在减压下蒸除甲醇, 得固体 3-三氟甲基苯乙酮肟 18.4g, 收 率 90.6%。 熔点: 79.5-81 °C。
实施例 4: 0-[2, 6-双 (4,6-二甲氧嘧啶基 -2-基氧基)苯甲酰基] (3-三氟甲基)苯乙酮肟 (HP-002) 的制备
在 500 ml反应瓶中加入 2, 6-双 (4, 6-二甲氧 -2-嘧啶基 -2-氧基) 苯甲酸 (21.5 g, 50 mmol ) 3-三氟甲基苯乙酮肟( 10.4g, 51.1 mmol)、 DIC (6.9g, 55.3 mmol)、 HOBt (0.80 g, 6.0 mmol)、 1, 2-二氯乙烷 300毫升, 在氮气保护下, 室温下反应 18小时, 反应结果 后, 过滤, 滤液在减压下浓缩回收 1, 2-二氯乙焼, 用甲醇重结晶,得白色晶体 0-[2, 6-双 (4,6-二甲氧嘧啶基 -2-基氧基)苯甲酰基] (3-三氟甲基)苯乙酮肟 24.4 g, 收率 79.3%, 熔点: 139.5-142.5°C o
H1 MR: (400 Hz, CDC13), 5(ppm), 7.839(d, 2H, J=2.6 Hz, Ph-CH), 7.686 (d, IH, J=2.6 Hz, Ph-CH), 7.606(t, IH, Ph-CH), 7.516(t, IH, Ph-CH), 7.234(d, 2H, J=6.6 Hz, Ph-CH), 5.766 (s, 2H, Pyrimidine CH), 3.809 (s, 12H, 4xCH30), 2.313 (s, 3H, CH3)。
C13 MR: (400 Hz, CDC13), δ (ppm), 172.89, 163.78, 160.33, 152.83, 151.90, 132.47, 132.21, 132.03, 131.56, 131.23, 130.858, 129.47, 129.22, 128.71, 125.95, 124.61, 120.57, 119.05, 84.96, 54.14。
实施例 5: 4-三氟甲基苯乙酮肟的制备
在 500 ml反应瓶中加入盐酸羟胺 (10.4 g, 150 mmol ) 甲醇 (200 ml)、 20%氢氧化
钠水溶液(30.0 g, 150 mmol)、 4-三氟甲基苯甲醛(17.4 g, 100 mmol), 在氮气保护 25 °C 下反应 4小时, 反应结果后, 在减压下蒸除甲醇, 加入水, 过滤得固体 4-三氟甲基苯乙 酮肟 19.5g, 收率 95.9%, 熔点: 105-106.6°C。
实施例 6: 0-[2, 6-双 (4,6-二甲氧嘧啶基 -2-基氧基)苯甲酰基] (4-三氟甲基)苯乙酮肟 (HP-003) 的制备
在 500 ml反应瓶中加入 2, 6-双 (4, 6-二甲氧 -2-嘧啶基 -2-氧基) 苯甲酸 (21.5 g, 50 mmol ) 4-三氟甲基苯乙酮肟( 11.2g, 55.0 mmol)、 DCC ( 10.7 g, 51.0 mmol)、 DMAP ( 0.6 g, 9.5 mmol)、 二氯甲烷 250毫升, 在氮气保护下, 室温下反应 24小时, 反应结 果后, 过滤, 滤液在减压下浓缩回收二氯甲烷, 用甲醇重结晶,得白色晶体 0-[2, 6-双 (4,6- 二甲氧嘧啶基 -2-基氧基)苯甲酰基] (4-三氟甲基)苯乙酮肟 12.1 g, 收率 78.6%, 熔点 133.3-135.7°C。
H1 MR: (400 Hz, CDC13), 5(ppm), 7.729(d, 2H, J=6.7 Hz, Ph-CH), 7.613 (d, 2H, J=6.7 Hz, Ph-CH), 7.575(t, 1H, J=6.6 Hz, Ph-CH), 7.211(d, 2H, J=6.6 Hz, Ph-CH), 5.737 (s, 2H, Pyrimidine CH), 3.785 (s, 12H, 4xCH30), 2.283 (s, 3H, CH3)。
C13 MR: (400 Hz, CDC13), δ (ppm), 172.88, 163.78, 160.43, 152.86, 151.95, 132.50, 132.23, 132.01, 131.56, 131.24, 130.86, 129.47, 129.24, 127.40, 125.92, 124.61, 120.48, 119.04, 84.97, 54.19。
实施例 7 除草活性测试
本发明的嘧啶水杨酸类化合物具有良好的除草活性,可用作除草剂的有效活性成分, 制备各种农药剂型, 例如可湿性粉末, 乳剂, 水分散颗粒剂、 片剂、 颗粒剂等。
使用本发明制备的各种除草剂进行除草活性测试, 结果如下:
1、 测试药剂及配制:
用分析天平称取一定质量的嘧啶水杨酸类化合物原药,用溶剂(丙酮、 DMF或 DMSO 中文件标注等) 溶解配制成 1.0-5.0%的乳油小制剂, 然后用含 0.15-0.25% TW-80的蒸熘 水稀释成一定浓度, 备用。
3、 试验方法
将供试杂草种子分单、 双子叶分别均匀播入内径 9cm盆钵中, 于温室中培养。 等单 子叶杂草长到 1-1.5叶期, 双子叶杂草真叶期时, 在自动喷雾装置上进行后茎叶处理。 每
处理 3次重复, 设空白对照, 处理后静置 4-5小时, 待叶上药液干后, 移入温室内培养。 每天观察植株生长情况, 定期记录受害症状, 于药害症状明显目测调查综合除草活性。
4、 结果调查
结果调查采用目测, 目测评价药剂对植株生长抑制、 畸形、 黄化、 腐烂、 坏死等影 响程度, 然后根据综合受害植株完全抑制, 评价标准见表 1。
表 1温室盆栽除草活性评价标准
嘧啶水杨酸类化合物除草活性测定结果见表 2。
表 2 嘧啶水杨酸类化合物的除草活性
从上表 2可以观察嘧啶水杨酸类化合物具有良好的抑制稗草, 千金子、 鸭舌草、 水 苋菜、 丁香蓼、 节节菜等杂草活性。
本发明的优点是:
1 ) 具有高效除草活性, 除草效果好;
2) 毒性低, 人畜安全;
3 ) 使用方便;
4) 制备方法简单。
本发明在世界上首次合成含三氟甲基苯乙酮肟嘧啶水杨酸类化合物, 具有明显的新
颖性和创造性, 本发明测定了嘧啶水杨酸类化合物对稗草, 千金子、 鸭舌草、 水苋菜、 丁香蓼、 节节菜等除草剂的活性, 其中嘧啶水杨酸类化合物 HP-003对稗草, 千金子、 鸭 舌草、 水苋菜、 丁香蓼、 节节菜的活性分别为 100、 99、 98、 100、 100、 95, 本发明 的嘧啶水杨酸类化合物的除草活性均高于对照产品五氟磺草胺和嘧啶肟草醚, 嘧啶水杨 酸类化合物的高效除草活性, 在现代农业生产中具有显著的实用性。
5.结论
本发明对嘧啶水杨酸类化合物进行了广泛的研究, 目的在于研究一种具有较好除草 选择性和除性活性的化合物, 结果发现, 在嘧啶水杨酸类化合物的特定位置上引入含氟 取代基, 即为本发明的用通式 (I)表示的嘧啶水杨酸类化合物对多年生杂草及一年杂草显 示出优良的选择性除草性能, 同时通式 (I)表示的嘧啶水杨酸类化合物对水稻作物具有高 度的安全性, 对人鸟等生物低毒, 对环境友好。
用通式 (I)表示的嘧啶水杨酸类化合物在其有效浓度下对禾本科杂草, 宽叶杂草, 一 年生杂草和多年生杂草均具有优异的除草活性, 且对有用作物如水稻、 小麦、 棉花等不 具有植物毒性。 特别对水稻田中本发明的化合物能以极低浓度完全控制一年生或多年生 杂草, 包括稗草、 马唐、 红脚稗、 双穗雀、 千金子等, 同时对水稻作物具有良好的安全 性和环境友好。 适用于水稻田作物。
换句话说, 若与欧洲专利 (EP 658549 A1 ) 及中国专利 (CN 1111623 ) 中所有提示 的化合物相比, 本发明的嘧啶水杨酸类化合物除草选择性和除草活性都非常优异, 特别 是在水稻作物中对稗草的防除选择性方面胜过前者, 而且, 本发明的嘧啶水杨酸类化合 物具有广谱除草范围, 它们能以比较低的剂量控制抑制稗草 、千金子、鸭舌草、水苋菜、 丁香蓼、 节节菜之类的一般难以防除的杂草, 而且对有效防除杂草所需的剂量低, 所以 本发明的嘧啶水杨酸类化合物对水稻作物具有高度的安全性, 对稗草、 千金子等杂草非 常有效, 具有广谱效果, 同时对环境友好, 低毒, 对人类安全, 在农药领域具有广泛的 应用前景。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的普通技术人员, 在不脱离本发明方法的前提下, 还可以做出若干改进和补充, 这些改进和补充也应视为 本发明的保护范围。
Claims
1. 一种新型除草活性的嘧啶水杨酸类化合物, 其特征在于, 所述的嘧啶水杨酸类化 合物为如下通式 (I) 所表示的 2,6-双 ((4,6-二甲氧嘧啶基 -2-基;)氧基)苯甲酸亚氨酯衍生 物:
R=H, o,m,p-CF3 (I)
其中 R表示邻、 间、 对位三氟甲基或为氢。
2. 根据权利要求 1所述的嘧啶水杨酸类化合物 , 其特征在于, 所述的 R为邻、 间、 对位三氟甲基。
3. 一种权利要求 1所述的嘧啶水杨酸类化合物的制备方法, 其特征在于, 包括以下 步骤:
步骤 A: 取代苯乙酮肟的制备: 以盐酸羟胺和取代基苯乙酮为原料, 加入溶剂醇和 无机碱作催化剂, 在 0°C~65°C温度条件下进行反应, 反应 1~5小时后, 经处理得取代苯 乙酮肟;
步骤 B: 0-[2,6-双 (4,6-二甲氧基 -2-嘧啶基)氧基] (取代基苯乙酮)肟的制备: 以 2, 6- 双(4, 6-二甲氧 -2-嘧啶基 -2-氧基)苯甲酸和上述取代三氟甲基苯乙酮肟原料, 在有机溶 剂、 催化剂和脱水剂作用下, 在常温下反应 10 24小时, 反应结束后过滤, 滤液在减压 下蒸除回收有机溶剂, 即得目标物化合物嘧啶水杨酸类化合物 0-[2,6-双 (4,6-二甲氧基 -2- 嘧啶基)氧基] (取代基苯乙酮)肟。
4. 根据权利要求 3所述的制备方法, 其特征在于, 所述的溶剂醇为甲醇、 乙醇、 异 丙醇、 正丁醇, 正丙醇。
5. 根据权利要求 3所述的制备方法, 其特征在于, 所述的无机碱为氢氧化钠、 氢氧 化钾、 氢氧化锂、 碳酸钠、 碳酸钾
6. 根据权利要求 3所述的制备方法, 其特征在于, 所述的有机溶媒二氯甲烷、 三氯 甲烷、 1, 2-二氯乙烷、 丙酮、 乙腈、 四氢呋喃、 二氧六环、 N, N-二甲基甲酰胺, 乙酸 甲酯、 乙酯乙酯、 乙酸丙酯、 乙醇丁酯等
7. 根据权利要求 3所述的制备方法, 其特征在于, 所述的步骤 B中催化剂为: 4-二 甲氨基吡啶 (DMAP)、 4-(Γ-四氢吡咯)吡啶 (4-PPY)。
8. 根据权利要求 3所述的制备方法, 其特征在于, 所述的脱水剂为 Ν, Ν'-二环己基 碳二亚胺 (DCC)、 Ν,Ν'-二异丙基碳二酰亚胺 (DIC)。
9. 根据权利要求 1或 2任一所述的嘧啶水杨酸类化合物在制备除草剂中的应用。
10. 根据权利要求 9所述的应用,其特征在于,所述的除草剂用于防除稗草、千金子、 鸭舌草、 水苋菜、 丁香蓼、 节节菜。
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US11834420B2 (en) * | 2019-07-30 | 2023-12-05 | Changzhou University | Preparation method of pyrimidinylthio-benzoate oxime ester compound and application thereof as herbicide |
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