CN111892510B - N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺及其用途 - Google Patents
N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺及其用途 Download PDFInfo
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- A01N39/00—Biocides, pest repellants or attractants, or plant growth regulators containing aryloxy- or arylthio-aliphatic or cycloaliphatic compounds, containing the group or, e.g. phenoxyethylamine, phenylthio-acetonitrile, phenoxyacetone
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- C07C235/00—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms
- C07C235/02—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton
- C07C235/04—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and saturated
- C07C235/16—Carboxylic acid amides, the carbon skeleton of the acid part being further substituted by oxygen atoms having carbon atoms of carboxamide groups bound to acyclic carbon atoms and singly-bound oxygen atoms bound to the same carbon skeleton the carbon skeleton being acyclic and saturated having the nitrogen atom of at least one of the carboxamide groups bound to a carbon atom of a six-membered aromatic ring
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Abstract
公开了一种化合物N‑(2‑溴‑4‑氟苯基)‑2‑(2‑氯‑4‑氟苯氧基)乙酰胺及其制备方法和农用生物活性。制备方法是在反应器内加入2‑氯‑4‑氟苯酚、碳酸钾、乙腈、碘化钾,低温下滴加N‑(2‑溴‑4‑氟苯基)‑2‑氯乙酰胺的乙腈液,然后将反应液升温至回流继续反应,反应结束后,从滤液获取产物。该化合物对杂草种子和植物病原菌具有较高的抑制作用。
Description
技术领域
本发明为化合物N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺及其制备方法和农用生物活性,具体的涉及有机化合物、有机合成及农业杀菌、除草领域。
背景技术
农药是在防治农、林业有害生物占有举足轻重的地位。现阶段,可以说没有农药就没有植物的安全。随着抗性发展,市场亟需新农药尤其是新作用机制的农药出现。由于氟原子电负性大、半径小,所形成的C-F键键能要比C-H键能大得多,从而使得有机氟化合物具有很好的稳定性,当含氟基团导入活性化合物后,由于含氟取代基的电子效应、阻断效应、伪拟效应、渗透效应协同作用产生了复杂的生理活性。含氟药物的创制已成为新医药、新农药开发的重要方向。基于此,我们研究含氟生理活性化合物的合成、创制方法。经过多年的合成和活性筛选,发现化合物N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺具有高效的除草、杀菌活性。
发明内容
本发明的目的是发明化合物N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺及其制备方法和用途。
本发明的方案如下:
N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺可由如下的路线制备:
制备方法是在反应器内加入2-氯-4-氟苯酚、碳酸钾、乙酐、乙腈、碘化钾,在20-60℃下滴加N-(2-溴-4-氟苯基)-2-氯乙酰胺的乙腈液,将反应液升温至回流继续反应,反应结束后,过滤,滤液浓缩得产物。
本发明的合成方法具有如下特点:反应步骤少、选择性好、原材料价廉易得、操作简单、工艺稳定、收率高,有利于工业化生产。
本发明的化合物具有高效的杀菌和除草活性。
以下实施例用于进一步说明本发明,但不限于本发明。
实施例1:在干燥的氮气置换的反应瓶中,加入2-氯-4-氟苯酚8.1 g、碳酸钾13.8g、乙腈120 mL、碘化钾0.75g,在40 ℃下,搅拌反应20 min,2小时内均匀滴加13.3 g N-(2-溴-4-氟苯基)-2-氯乙酰胺与15ml乙腈的混合液,升温,回流状态下反应约20 h。反应结束后,过滤,浓缩得粗产品N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺,经重结晶得浅黄产品7.8g。
实施例2:在干燥的反应瓶中,加入2-氯-4-氟苯酚8.1 g、碳酸钾13.8 g、乙腈120mL、碘化钾0.75g,在20 ℃下,搅拌反应20 min,2小时内均匀滴加13.3 g N-(2-溴-4-氟苯基)-2-氯乙酰胺与15ml乙腈的混合液,升温,回流状态下反应约20 h。反应结束后,过滤,浓缩得粗产品N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺,经重结晶得暗红产品5.2g。
实施例3:在干燥的氮气置换的反应瓶中,加入2-氯-4-氟苯酚8.1 g、碳酸钾13.8g、乙腈120 mL,在60 ℃下,搅拌反应20 min,2小时内均匀滴加13.3 g N-(2-溴-4-氟苯基)-2-氯乙酰胺与15ml乙腈的混合液,升温,回流状态下反应约20 h。反应结束后,过滤,浓缩得粗产品N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺,经重结晶得浅黄产品5.7g。
目标化合物N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺的表征
质谱分析表明,所得化合物的分子量为376.6,与理论值相符。
1H-NMR(500 MHZ, CDCl3), δ (ppm): 4.62(s, 2H, -CH2), 6.89-6.96(m, 1H,Ar-H), 7.02-7.09(m, 3H, Ar-H), 7.33(dd, 1H, Ar-H), 8.34(dd, 1H, Ar-H), 8.90(s, 1H, -NH). 13C NMR(500 MHz, CDCl3): 68.11, 114.05, 116.53, 119.75), 122.86,122.93, 131.11, 151.65, 156.29, 159.94, 166.68。
农药(杀菌活性)典型测定:
取适量一定浓度的N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺的药液置于100mL温度为50℃左右PDA灭菌培养基中,摇匀,倒入直径为60mm的灭菌培养皿中,冷却凝固后,分别移接生长一致、直径为5mm的菌饼,以加入等量相应溶剂的灭菌培养基作为空白对照,每处理设3个重复。放入25℃恒温培养箱中培养一定时后,采用十字交叉法测量菌落直径,以纯生长量为基准计算抑菌率,求取有效中浓度EC50。如对番茄灰霉病菌、苹果腐烂病菌EC50分别为26.97、37. 70 mg/L。
农药(除草活性)典型测定:
将供试植物种子经0.2%次氯酸钠溶液浸泡15min后,用自来水冲洗数次并置流水下浸泡4h左右,而后用蒸馏水洗涤数次,均匀摆放在带盖的方盘内的吸水纸上,滴加蒸馏水至种子不漂浮,遮光置于全智能人工气候箱内发芽,待植物根达2mm左右时,便可选出用作供试种芽。移植种芽到事先用N-(2-溴-4-氟苯基)-2-(2-氯-4-氟苯氧基)乙酰胺的丙酮溶液与0.5%琼脂液制备有效成分含量为50、20mg/L的凝胶上,以等量丙酮作空白对照,每个处理设3个平行。接种完,将其放入人工气候箱遮光培养。人工气候箱设置为14h(25℃)、10h(20℃)的自动循环,相对湿度为60%。待对照组长好后,用电子游标卡尺分别测量供试植物胚根和胚轴的长度,以纯生长量为基准计算抑制率。如50mg/L的剂量下对苘麻胚根和胚轴的抑制率均为100%,20mg/L对苘麻胚根和胚轴的抑制率均高于90%;50mg/L 、20mg/L剂量下对稗草胚根抑制率均高于84%。
实验表明,这类化合物的结构稍有变化,其活性差别很大。如化合物N-(2-溴-4-氟苯基)-2-(2-溴-4-氟苯氧基)乙酰胺,仅把本发明化合物中的氯原子换为溴,其对苹果腐烂菌表现出很低的活性,同样剂量下对稗草、苘麻的胚根和胚轴表现出极弱的活性。
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Citations (4)
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JPS4837819B1 (zh) * | 1965-05-11 | 1973-11-14 | ||
US4185994A (en) * | 1977-02-02 | 1980-01-29 | Hodogaya Chemical Company, Limited | Herbicidal compound |
US4666943A (en) * | 1982-07-27 | 1987-05-19 | Sumitomo Chemical Company, Limited | Fungicidal anilides |
CN105646361A (zh) * | 2016-02-17 | 2016-06-08 | 吉首大学 | 一种2,4,5-三芳基咪唑型化合物及其制法和用途 |
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Patent Citations (4)
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JPS4837819B1 (zh) * | 1965-05-11 | 1973-11-14 | ||
US4185994A (en) * | 1977-02-02 | 1980-01-29 | Hodogaya Chemical Company, Limited | Herbicidal compound |
US4666943A (en) * | 1982-07-27 | 1987-05-19 | Sumitomo Chemical Company, Limited | Fungicidal anilides |
CN105646361A (zh) * | 2016-02-17 | 2016-06-08 | 吉首大学 | 一种2,4,5-三芳基咪唑型化合物及其制法和用途 |
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Novel N-nitroacetamide derivatives derived from 2, 4-D: Design, synthesis, bioevaluation, and prediction of mechanism of action;Zengjun Wei et al.;《Pesticide Biochemistry and Physiology》;20130423;第106卷;68-74 * |
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Zengjun Wei et al..Novel N-nitroacetamide derivatives derived from 2, 4-D: Design, synthesis, bioevaluation, and prediction of mechanism of action.《Pesticide Biochemistry and Physiology》.2013,第106卷 * |
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