WO2017036427A2 - 一种四嗪吡唑类杀螨剂 - Google Patents

一种四嗪吡唑类杀螨剂 Download PDF

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WO2017036427A2
WO2017036427A2 PCT/CN2016/104513 CN2016104513W WO2017036427A2 WO 2017036427 A2 WO2017036427 A2 WO 2017036427A2 CN 2016104513 W CN2016104513 W CN 2016104513W WO 2017036427 A2 WO2017036427 A2 WO 2017036427A2
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compound
reaction
tetrazine
acaricide
formula
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PCT/CN2016/104513
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WO2017036427A3 (zh
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许良忠
吴华龙
王明慧
袁建坡
鞠光秀
徐姗姗
陈格新
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浙江博仕达作物科技有限公司
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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
    • A01N43/713—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with four or more nitrogen atoms as the only ring hetero atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
    • C07D403/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings
    • C07D403/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing two hetero rings directly linked by a ring-member-to-ring-member bond

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  • the present invention relates to the field of acaricides in agricultural chemicals, and relates to a tetrazinepyrazole acaricide.
  • the present invention has designed and synthesized a tetrazinepyrazole acaricide.
  • the use of the compound of the formula I as shown in the present invention as an acaricide is not disclosed.
  • the object of the present invention is to provide a tetrazinepyrazole acaricide with novel structure, safe production and use, good killing effect and low control cost, which can be used for the prevention and control of agricultural or forest pests.
  • the compound of formula I can be prepared by the following reaction:
  • the compound of the present invention introduces a pyrazole ring and a phenylcyclo-tert-butyl group into a tetrazine acaricide structure, and has remarkable structural novelty.
  • the anti-killing effect of the compound of the present invention on cockroach eggs is 86% at 10 ppm, while the ovicidal activity of fluoxazine at the same concentration is only 48%; at 1 ppm, the compound of the present invention still has 41% inhibition.
  • the kill rate, while fluoxazine has no ovicidal effect at this concentration.
  • the acaricidal activity of the compound of the present invention is 5 to 8 times that of fluoxazine (KC), showing a remarkable advantage of ultra-high efficiency.
  • the compound of the present invention is a nitrogen ring compound, has the characteristics of low toxicity to the beneficial organism, easy degradation, and good environmental compatibility, and has the prospect of industrialization as a new type of creative acaricide.
  • the compound of the formula I of the present invention can be used alone or in combination with other active substances in the prevention and control of harmful hydrazine to improve the overall performance of the product.
  • Example 2 The activity of the acaricidal egg was determined by a dipping method and a statistical method for correcting the mortality of the pest. The specific process is: diluting the test agent to the required concentration according to the active ingredients, and injecting 50 mL of the drug solution into the culture dish under aseptic conditions, and then immersing the eggs in the cinnabar, respectively, and the eggs are normally raised according to the indoor standardized method. For the leaves of the group, a plate with 50 mL of sterilized water was added as a blank control. Place the culture dish in a constant temperature incubator at 24 ⁇ 1 °C. The mortality rate was investigated after 48 hours.
  • the compound I of the present invention has a significantly better inhibitory effect on the eggs of the cinnabar, and is superior to the fluoropyridazine (KC).

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  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Plant Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Agronomy & Crop Science (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

本发明提供一种四嗪吡唑类化合物，其结构如式 (I) I所示。该化合物对害螨及螨卵有超高效抑杀作用，可作为杀螨剂用于农业螨害的防治。

Description

一种四嗪吡唑类杀螨剂
本发明请求申请日为2015年09月06日的中国发明专利申请CN 2015105592946为优先权。
技术领域  本发明属于农药中杀螨剂领域，涉及一种四嗪吡唑类杀螨剂。
背景技术  害螨危害农作物影响农作物正常生长，导致作物减产及品质下降。防治农业害螨的杀螨剂品种繁多，如哒螨灵、霸螨灵、尼索朗、螺螨酯、阿维菌素等。由于害螨极易产生抗药性，众多杀螨剂品种因抗药性已失去原有的高效性，已不能满足现代农业对杀螨剂超高效、长持效及低公害的要求。因此开发新型高活性杀螨剂是当务之急。US4237127及US5455237报道了四嗪类化合物及其在农业防治螨害方面的应用，由此开发出对螨卵高效的杀螨剂品种“四螨嗪”，在螨害治理方面已发挥了重要作用。上世纪90年代匈牙利Chinion公司通过对“四螨嗪”进行结构改造，开发出“四螨嗪”类似物“氟螨嗪”，对各种植食性叶螨均有效，其杀螨卵活性是四螨嗪的四倍，成为杀螨剂领域超高效、长持效、低公害的代表性杀螨剂品种。
Figure PCTCN2016104513-appb-000001
虽然氟螨嗪具有很好的触杀性，但是内吸性比较弱，只有中度的内吸性，所以喷雾要均匀；而且在长期的使用过程中也产生了抗药性问题。为了解决上述问题，本发明设计并合成了一种四嗪吡唑类杀螨剂，在现有技术中，如本发明所示的式I化合物用作杀螨剂未见公开。
发明内容  本发明的目的是提供一种结构新颖、生产及使用安全、杀螨效果好、防治成本低的四嗪吡唑类杀螨剂，可用于农业或林业害螨的防治。
本发明的技术方案如下：
一种四嗪吡唑类杀螨剂，结构如式I所示：
Figure PCTCN2016104513-appb-000002
式I化合物可通过如下反应制备：
(1)对叔丁基苯甲酸和甲醇反应生成对叔丁基苯甲酸甲酯(化合物Ⅱ)：
Figure PCTCN2016104513-appb-000003
(2)化合物Ⅱ和水合肼反应生成对叔丁基苯甲酰肼(化合物Ⅲ)：
Figure PCTCN2016104513-appb-000004
(3)4-氯-3-乙基-1-甲基-1H-吡唑-5-羧酸和氯化亚砜反应生成4-氯-3-乙基-1-甲基-1H-吡唑-5-酰氯(化合物Ⅳ)：
Figure PCTCN2016104513-appb-000005
(4)化合物Ⅲ和化合物Ⅳ反应生成N-(4-叔丁基-苯甲酰基)-N'-(4-氯-3-乙基-1-甲基-1H-吡唑-5-酰基)肼(化合物Ⅴ)：
Figure PCTCN2016104513-appb-000006
(5)化合物Ⅴ和五氯化磷生成N-(4-叔丁基-苯基)氯甲叉基-N’-(4-氯-3-乙基-1-甲基-1H-吡唑基)氯甲叉基肼(化合物VI)：
Figure PCTCN2016104513-appb-000007
(6)化合物Ⅵ和水合肼成环生成3-(4-叔丁基-苯基)-6-(4-氯-5-乙基-2-甲基-2H-吡唑基)-1,2-二氢-1,2,4,5-四嗪(化合物Ⅶ)：
Figure PCTCN2016104513-appb-000008
(7)化合物Ⅷ用亚硝酸氧化生成化合物I
Figure PCTCN2016104513-appb-000009
本发明的优点和积极效果：
本发明化合物(式I)将吡唑环及苯环叔丁基引入四嗪类杀螨剂结构中，具有显著的结构新颖性。本发明化合物对螨卵的抑杀效果，在10ppm达86％，而同浓度下氟螨嗪的杀卵活性只有48％；在1ppm下本发明化合物仍有41％的抑 杀率，而氟螨嗪在该浓度下基本无杀卵作用。本发明化合物的杀螨卵活性是氟螨嗪(KC)的5～8倍，表现出超高效性的显著优点。而且本发明化合物为氮环类化合物，具有对有益生物低毒性、易降解、环境相容性好的特点，具有作为创制性杀螨剂新品种产业化的前景。
本发明式I化合物在防治有害螨时，可单独使用，也可与其它活性物质组合使用，以提高产品的综合性能。
具体实施方式
下列合成实例、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
实例1、式Ⅰ化合物的制备：
(1)化合物Ⅱ的合成：
向250mL三口烧瓶中加入17.8g(0.1mol)对叔丁基苯甲酸，100mL甲醇，冰浴下滴加17.85g(0.15mol)氯化亚砜，搅拌升温至回流，搅拌反应8h。薄层色谱跟踪反应，待原料点消失后，停止反应。减压蒸馏除去溶剂得粗品17.66g，产率92％。
(2)化合物Ⅲ的合成：
向100mL三口烧瓶中加入8.4g水合肼，40mL水，冰浴下滴加17.28g(0.09mol)化合物Ⅱ，搅拌升温至回流，搅拌反应5h。薄层色谱跟踪反应，待原料点消失后，停止反应。减压蒸馏除去低沸物，冷却结晶，抽滤得粗品15.38g，产率89％。
(3)化合物Ⅳ的合成：
向250mL三口烧瓶中加入18.85g(0.1mol)4-氯-5-乙基-2-甲基-2H-吡唑 -3-羧酸，100mL甲苯，常温下滴加17.85g(0.15mol)氯化亚砜，搅拌升温至回流，搅拌反应2-3h。薄层色谱跟踪反应，待原料点消失后，停止反应。减压蒸馏除去溶剂，得产品20.7g，产率100％。
(4)化合物Ⅴ的合成：
向250mL三口烧瓶中加入15.36g(0.08mol)化合物Ⅲ，8.9g(0.088mol)三乙胺，100mL乙酸乙酯，常温下下滴加18.22g(0.088mol)化合物Ⅳ，搅拌升温至回流，搅拌反应4h。薄层色谱跟踪反应，待原料点消失后，停止反应。抽滤去除三乙胺盐酸盐，减压蒸馏除去溶剂得粗品24.62g，产率85％。
(5)化合物Ⅵ的合成：
向250mL三口烧瓶中加入18.13g(0.05mol)化合物Ⅴ，80mL甲苯，分批加入20.85g(0.1mol)PCl5，搅拌升温至40℃，搅拌反应10h。薄层色谱跟踪反应，待原料点消失后，停止反应。冷却后蒸去溶剂，残留物在冰水浴中，用稀的氢氧化钠水溶液调节pH至中性，用乙酸乙酯萃取。有机层依次用水、饱和食盐水洗涤，用无水硫酸钠干燥，脱溶后得到紫红色固体15g，收率75％。
(6)化合物Ⅶ的合成：
250mL三口烧瓶中加入12.0g(0.03mol)化合物Ⅵ,甲苯60mL，在40℃时，将2.81g(0.045mol)水合肼滴加到反应液中，滴加完后再保温反应4h。冷却后，加入40mL水，过滤析出的固体，得到产品8.37g，收率77.8％。
(7)化合物I的合成：
100mL三口烧瓶中加入7.17g(0.02mol)化合物Ⅶ,乙酸20mL，搅拌下将0.026mol亚硝酸钠的水溶液(20％)在室温下滴加入反应液中，搅拌过夜。过滤析出的固体，并且用水洗至中性，干燥，得到粗产品。粗产品过层析柱(石油醚:乙酸乙酯＝5:1)，得到紫红色粉末状目标产品5.28g，熔点95.3～98.7℃， 收率74.1％。1H NMR(500MHz,DMSO)，δ/ppm：7.998-8.014(2H,Ar-H),7.665-7.682(2H,Ar-H),4.306(3H,NCH3-H),2.615-2.660(2H,CH2-H),1.369(9H,CH3-H),1.204-1.235(3H,CH3-H).
生物活性测试
实例2、采用浸渍法和统计校正害虫死亡率的方法测定杀螨卵活性。具体过程是：将供试药剂按有效成分分别稀释至所需浓度，在无菌条件下各取50mL药液注入培养皿内，再分别浸入有朱砂螨卵(螨卵按室内标准化方法正常饲养的群体)的叶片，以添加50mL灭菌水的平板做空白对照。将培养皿放在24±1℃恒温培养箱内。48h后调查统计死亡率。
表1本发明化合物(式I)杀朱砂叶螨螨卵试验结果
Figure PCTCN2016104513-appb-000010
根据测试结果可知，本发明化合物I对朱砂叶螨螨卵抑杀效果显著优于氟螨嗪(KC)。

Claims (3)

  1. 一种四嗪吡唑类化合物，结构如式I所示：
    Figure PCTCN2016104513-appb-100001
  2. 根据权利要求1所述的一种四嗪吡唑类化合物的用途，其特征在于式I化合物单一使用或与另外的生物活性化合物组合使用，对农业害螨有防治效果。
  3. 一种杀螨组合物，含有权利要求1所述的式I化合物为活性组分和农业上可接受的载体。
PCT/CN2016/104513 2015-09-06 2016-11-04 一种四嗪吡唑类杀螨剂 WO2017036427A2 (zh)

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