CN111548347B - 含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物及其制备方法与用途 - Google Patents
含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物及其制备方法与用途 Download PDFInfo
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Abstract
本发明涉及含2‑氰基亚胺基‑1,3‑噻唑烷杂环的吡唑类化合物(I)及其制备方法与用途。通过2‑氰基亚胺基‑1,3‑噻唑烷(II)与吡唑取代物(III)的反应得到。所述含2‑氰基亚胺基‑1,3‑噻唑烷杂环的吡唑类化合物对有害昆虫显示出优良的杀虫效果,该化合物可用于制备农业、园艺等领域的杀虫剂。
Description
技术领域
本发明涉及化学农药领域,具体涉及含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物及其制备方法与用途。
背景技术
害虫的防治一直以来是农药科学研究的核心领域,杀虫剂的使用使多数害虫得到有效控制。但一些害虫近年来对传统农药产生了抗药性。因此,农药化学工作者需要研发出新型的高效农药。
取代吡唑类化合物是重要的杂环化合物,在农药领域发挥着重要作用,如吡唑类杀虫剂氯虫酰胺和氰虫酰胺等。
2-氰基亚胺基-1,3-噻唑烷环亦是重要的杂环化合物,在农业生产领域也有广泛的应用,如杀虫剂噻虫啉等。
因此,为了继续从吡唑类化合物中探讨出具有良好杀虫活性的新化合物,合理地将取代吡唑单元与2-氰基亚胺基-1,3-噻唑烷环连接在一起,本发明公开了一类具有农用杀虫应用价值的含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物。
发明内容
本发明的目的是提供针对多种害虫显示出优良杀虫效果,而且高效的含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物,以满足作物保护对高效杀虫剂需求。
本发明的又一个目的是提供上述化合物在制备杀虫剂方面的用途。
本发明的另一目的是提供上述化合物的制备方法。
为解决上述技术问题,本发明的第一方面提供含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物,其有通式I的结构,
优选地,所述含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物,有如下的结构:
本发明的第二方面提供上述含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物的制备方法,其包括以下反应步骤:
将化合物II溶于有机溶剂中,加入缚酸剂,然后加入化合物III,反应一段时间后,减压除去溶剂后所得残余物经分离纯化得目标化合物I,
优选地,含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物的制备方法如下:
通式I化合物对粘虫等害虫具有良好的杀虫效果,因而本发明的化合物可用作制备杀虫剂,进而保护农业、园艺等植物。当然,本发明的化合物可防治的有害生物不限于上述举例的范围。
当由通式I表示的本发明的化合物用作农业、园艺等领域的杀虫剂时,可单独使用,或以杀虫组合物的方式使用,如以式I为活性成分,加上本领域常用的农药助剂加工成水乳剂、悬浮剂、水分散颗粒剂、乳油等。
常用的农药助剂包括:液体载体,如水;有机溶剂如甲苯、二甲苯、环己醇、甲醇、丁醇、乙二醇、丙酮、二甲基甲酰胺、乙酸、二甲亚砜、动物和植物油及脂肪酸;常用的表面剂如乳化剂和分散剂,包括阴离子表面活性剂、阳离子表面活性剂、非离子表面活性剂和两性表面活性剂;其它助剂,如湿润剂、增稠剂等。
由通式I表示的本发明的化合物用作杀虫剂中的活性成分时,在所述杀虫剂中的含量在0.1%至99.5%的范围内进行选择,并可根据制剂形式和施用方法确定适当的活性成分含量。通常,在水乳剂中含有5%至50%(重量百分比,下同)所述的活性成分,优选其含量为10%至40%;在悬浮剂中含有5%至50%的活性成分,优选其含量为5%至40%。
对于本发明的杀虫剂的使用,可选择常用的施药方法,如茎叶喷雾、水面施用、土壤处理和种子处理等。例如,当采用茎叶喷雾时,作为活性成分的由通式I表示的化合物的可使用浓度范围为1至1000μg/mL的水乳剂、悬浮剂、水分散颗粒剂、乳油,优选其浓度为1至500μg/mL。
本发明公开的含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物对粘虫等害虫表现出良好的杀虫作用,因此可用来制备用于农业、园艺等领域的杀虫剂。
具体实施方式
以下结合具体实施例对上述方案做进一步说明。应理解,这些实施例是用于说明本发明而不限于限制本发明的范围。实施例中采用的实施条件可以根据具体厂家的条件做进一步调整,未注明的实施条件通常为常规实验中的条件。
实施例1:
将6mmol中间体II溶于30mL DMF,加入20mmol碳酸氢钠,然后加入中间体IIIa8mmol。接着将反应液加热至85℃,反应20小时。停止反应,减压除去溶剂后所得残余物经柱层析分离得目标化合物Ia;1H NMR(CDCl3,400MHz)δ:7.76(s,1H,N=CH),7.45(d,J=8.8Hz,2H,Ar-H),6.81(d,J=8.8Hz,2H,Ar-H),4.08~4.11(m,2H,CH2),3.78~3.82(m,2H,CH2),3.57~3.63(m,5H,CH3 and CH2),3.30~3.34(m,2H,CH2),2.36(s,3H,CH3).
实施例2:
将8mmol化合物II溶于35mL乙腈,加入20mmol碳酸铯,然后加入中间体IIIb10mmol。接着加热回流反应18小时。停止反应,减压除去溶剂后所得残余物经柱层析分离得目标化合物Ib;1H NMR(CDCl3,400MHz)δ:7.74(s,1H,N=CH),7.42(d,J=8.8Hz,2H,Ar-H),6.80(d,J=8.8Hz,2H,Ar-H),3.84~3.95(m,4H,2×CH2),3.61(s,3H,CH3),3.35~3.44(m,4H,2×CH2),2.36(s,3H,CH3),1.50~1.61(m,4H,2×CH2),1.26~1.35(m,4H,2×CH2).
实施例3:
将10mmol化合物II溶于35mL氯仿,加入50mmol吡啶,然后加入中间体IIIc13mmol。接着继续室温反应12小时。停止反应,减压除去溶剂后所得残余物经柱层析分离得到目标化合物Ic;1H NMR(CDCl3,400MHz)δ:7.74(s,1H,N=CH),6.85~7.03(m,4H,Ar-H),3.84~3.96(m,4H,2×CH2),3.62(s,3H,CH3),3.36~3.44(m,4H,2×CH2),2.37(s,3H,CH3),1.51~1.61(m,4H,2×CH2),1.24~1.37(m,4H,2×CH2).
实施例4:
将9mmol化合物II溶于35mL DMA,加入30mmol 4-二甲氨基吡啶(DMAP),然后加入中间体IIId 8mmol。接着将反应液加热至85℃,反应15小时。停止反应,减压除去溶剂后所得残余物经柱层析分离得目标化合物Id;1H NMR(CDCl3,400MHz)δ:7.74(s,1H,N=CH),7.60(d,J=8.8Hz,2H,Ar-H),6.69(d,J=8.8Hz,2H,Ar-H),3.84~3.95(m,4H,2×CH2),3.61(s,3H,CH3),3.35~3.44(m,4H,2×CH2),2.37(s,3H,CH3),1.51~1.59(m,4H,2×CH2),1.27~1.34(m,4H,2×CH2).
实施例5:
样品对粘虫的杀虫活性筛选
采用国际抗性行动委员会(IRAC)提出的浸叶法:供试靶标为粘虫,即将适量玉米叶在配好的药液中充分浸润后自然阴干,放入垫有滤纸的培养皿中,接粘虫3龄中期幼虫10头/皿,置于24-27℃观察室内培养,48小时后调查结果。以毛笔触动虫体,无反应视为死虫。试验浓度为500μg/mL(其它浓度的药液可由500μg/mL的药液稀释而得)。
目标化合物Ⅰa-Ⅰd的杀虫活性数据列于表1中。在测试浓度为500μg/mL时,化合物Ⅰa-Ⅰd对粘虫都显示出良好的杀虫作用,其杀虫效果分别为100%,100%,100%和100%。
表1.目标化合物Ia-Id的初步杀虫活性数据
以上实验结果表明,将取代吡唑单元与2-氰基亚胺基-1,3-噻唑烷环连接在一起,得到的新型吡唑化合物具有优良的杀虫作用。
以上显示和描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解,本发明不受上述实例的限制,上述实例和说明书中描述的只是说明本发明的原理,在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进,这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等同物界定。
Claims (4)
3.如权利要求1所述的含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物(I)在制备杀虫剂方面的用途,其特征在于:该化合物单独使用;或以杀虫组合物的方式使用,即以权利要求1中化合物(I)为活性成分,加上本领域常用的农药助剂加工成水乳剂、悬浮剂、水分散颗粒剂、乳油。
4.如权利要求3所述的含2-氰基亚胺基-1,3-噻唑烷杂环的吡唑类化合物(I)在制备杀虫剂方面的用途,其特征在于:权利要求1所述的化合物(I)用作杀虫剂的活性成分时,在所述杀虫剂中的含量在0.1%至99.5%的范围内进行选择。
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Application publication date: 20200818 Assignee: DONGLI (NANTONG) CHEMICALS Co.,Ltd. Assignor: NANTONG University Contract record no.: X2024980032733 Denomination of invention: Pyrazole compounds containing 2-cyanoimino-1,3-thiazole heterocycles and their preparation methods and applications Granted publication date: 20221104 License type: Common License Record date: 20241205 |