3-(2-furan)-4-hydroxycoumarin compound, preparation method thereof and application of anti-plant fungus

The invention discloses a 3-(2-furan)-4-hydroxycoumarin compound, preparation method thereof and application of anti-plant fungus. The formula is shown in description, wherein R1, R2, R3 and R4 independently represent any of H, methyl, methoxy, ethoxy, fluorine, chlorine and bromine, 3-(2- Hydroxyphenyl)-3-Oxopropanoate ester compounds, K10 montmorillonite and 2.5-Dimethoxy-2.5-dihydrofuran is heated and subjected to coupling reaction, sodium hydroxide is added, and refluxed in ethanol solution, followed by separation and purification, the pure product of the compound is obtained. The synthesis method has the advantages of no solvent, cheap raw materials and K10 montmorillonite catalysis, simple and convenient process, simple operation, high product yield, low production cost and the like,and the obtained compound has good anti-plant fungal effect and can be developed into a novel pesticide with anti-plant fungi. 本发明公开了类3-(2-呋喃)-4-羟基香豆素类化合物及其制备方法和抗植物真菌的应用，该化合物的结构式为式中R、R、R、R各自独立的代表H、甲基、甲氧基、乙氧基、氟、氯、溴、羟基中任意种。将3-