CN106083889B - 一类噁唑并香豆素衍生物在农药方面的应用 - Google Patents

一类噁唑并香豆素衍生物在农药方面的应用 Download PDF

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CN106083889B
CN106083889B CN201610417330.XA CN201610417330A CN106083889B CN 106083889 B CN106083889 B CN 106083889B CN 201610417330 A CN201610417330 A CN 201610417330A CN 106083889 B CN106083889 B CN 106083889B
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coumarin derivative
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CN106083889A (zh
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郝双红
李仕强
魏艳
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Qingdao Agricultural University
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D498/00Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms
    • C07D498/02Heterocyclic compounds containing in the condensed system at least one hetero ring having nitrogen and oxygen atoms as the only ring hetero atoms in which the condensed system contains two hetero rings
    • C07D498/04Ortho-condensed systems
    • 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
    • A01N43/72Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/74Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,3
    • A01N43/761,3-Oxazoles; Hydrogenated 1,3-oxazoles

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Abstract

本发明(名称为:一类噁唑并香豆素衍生物在农药方面的应用)涉及一类噁唑并香豆素衍生物及其制备方法,以及在抑菌、除草方面的用途。这类噁唑并香豆素衍生物均可通过4‑甲基‑6‑氨基‑7‑羟基香豆素与不同羧酸缩合制备,这些化合物可作为杀菌剂防治番茄灰霉病菌、柑橘炭疽病菌、白菜黑斑病菌、小麦全蚀病菌、棉花枯萎病菌,也可作为除草剂防治杂草马唐、灰藜。

Description

一类噁唑并香豆素衍生物在农药方面的应用
技术领域
本发明为一类噁唑并香豆素衍生物及其制备与农药方面的应用,具体的涉及农用杀菌剂及除草剂领域。
背景技术
天然产物香豆素和噁唑类化合物均是已知的具有生物活性的化合物,该专利涉及的化合物中既有香豆素的结构,又有噁唑的结构,是一种具有优异农用生物活性的新化合物。
发明内容
本发明的目的在于提供一类噁唑并香豆素类化合物及其制备方法,它可应用于农业上以防治作物病菌或农田杂草。
本发明的技术方案如下:
本发明提供的噁唑并香豆素类化合物,其结构通式如下:
R选自C1-C20烷基、C2-C20烯基、C1-C20卤代烷基、C3-C20环烷基、取代芳基、取代芳杂基;及其异构体。
噁唑并香豆素衍生物合成方程式:
Ⅱ Ⅲ Ⅰ
式中R定义如上。
通式化合物制备方法:在适当溶剂中,适当温度下,加入适当催化剂,Ⅱ和Ⅲ发生缩合,反应一定时间后,处理即得目的产物Ⅰ。
适当溶剂可选二甲苯、氯苯、丙苯、丁基苯、二甲基甲酰胺、二甲基乙酰胺、二甲基亚砜、环丁砜等。
适当温度指120~180 ℃。
适当催化剂指聚磷酸。
反应时间为3小时至10小时。
本发明的化合物对柑橘炭疽病菌、棉花枯萎病菌、小麦全蚀病菌、白菜黑斑病菌、番茄灰霉病菌等有良好的抑制作用。
本发明的化合物对单子叶杂草马唐及双子叶杂草灰藜的生长具有良好抑制作用。
具体实施方式
实例1
化合物Ⅰa的制备
1.0 g(5 mmol)4-甲基-6-氨基-7-羟基香豆素中,加入6 mmol CH3CH2COOH,5 gPPA(多聚磷酸),加热至150 ℃搅拌反应5.5 h。TLC跟踪反应 [ 展开剂(石油醚:乙酸乙酯=3:1)]。反应结束后,将产物倒入10 mL蒸馏水中搅拌30 min,用乙酸乙酯(3*20 mL)萃取,无水硫酸钠干燥,浓缩得粗产物。硅胶柱层析[ 流动相 V(乙酸乙酯):V(石油醚)=1:10 ] 分离得淡黄色固体。
化合物Ⅰb~Ⅰi按照与Ⅰa相似的方法合成,相关结构数据列于表1中。
表1 化合物Ⅰa ~Ⅰi的1H NMR数据
实例2 抑菌活性测定
测定采用生长速率法。待测化合物加丙酮溶解,配制成不同浓度梯度的药液。无菌条件下,分别移取1ml加入到100 mL 60℃左右灭菌的PDA培养基中, 混匀后,快速倒入灭菌的培养皿中,凝固后将供试菌菌饼移接至培养基上。每个处理重复三次,以含等量丙酮的灭菌培养基作对照。置于27℃恒温培养箱中培养, 待对照组菌落长至培养皿直径的3/4时,采用十字交叉法测量菌落直径,以其平均值作为菌落大小。利用杀菌毒力方程软件计算得目标化合物的毒力方程、相关系数及EC50,见表2。
表2 化合物的抑菌活性(EC50,mg/L)
实例3 除草活性测定
称取0.015 g化合物,加入5 mL丙酮,溶解配制成3 g/L母液;取1 mL上述3 g/L的母液,加入4 mL丙酮,溶匀配制成600 mg/L浓度的药液。两种药液各取1 mL分别加入到30mL 0.5%的琼脂溶液中,充分混匀,然后分别倒入3个10 mL小烧杯中,制成带毒培养基,每个浓度重复3次。取1 mL丙酮加入培养基中做空白对照(CK)。把催芽露白的马唐和反枝苋种子分别接到培养基上,每个小杯接种10粒,将接种后的小杯放入培养箱(27℃,相对湿度90%,L/D=8h:16h)中培养,当空白对照根长到合适长度时测量种子根、茎长度。按照下式计算根茎生长抑制率:
抑制率/%=[对照根(茎)长-处理根(茎)长]/对照根(茎)长×100
部分化合物的除草活性数据列于表3中。
表3 化合物的除草活性(抑制率,%)

Claims (5)

1.所述噁唑并香豆素衍生物结构如通式所示:
R选自乙基、3-溴丙基、环己基、烯丙基、2-氯苯基、2,4-二氯苯基或噻吩-2-基。
2.权利要求1所述化合物,其特征在于取代基 R为环己基、2,4-二氯苯基或噻吩-2-基。
3.权利要求1所述化合物,其特征在于取代基 R为乙基、苯基或2-氯苯基。
4.权利要求2所述化合物在防治植物病害方面的用途,所述的植物病害包括番茄灰霉病菌、柑橘炭疽病菌、白菜黑斑病菌、小麦全蚀病菌、棉花枯萎病菌。
5.权利要求3所述化合物在防治杂草方面的用途,所述的杂草包括单子叶植物马唐及双子叶植物灰藜。
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