Compound for preventing and treating bayberry brown spot and composition using same
A brown spot disease and composition technology, which is applied in the field of compounds and compositions for preventing and treating bayberry brown spot disease, and can solve the problems of reduced control effect and the like
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preparation Embodiment 1
[0018] Synthetic steps:
[0019] (1) N-methyl-4-chloropyrrole-2-carboxamide (2mmol) and 2-amino-6-hydroxyquinazoline (2mmol) and CsCO 3 (6 mmol) was added to DMSO (5 mL), and reacted at 80° C. for 5 hours. Concentrated under reduced pressure, purified by silica gel column (eluent CHCl 3 / MeOH=100 / 8), a white solid was obtained with a yield of 85.0%.
[0020] (2) The product (1.22mmol) of step (1) was dissolved in anhydrous DMF (5mL), 80% NaH (6.12mmol) was added at 0°C, and stirred for 15 minutes. Then, 3,4-difluorophenylisocyanate (1.83 mmol) was added, and stirred at 0° C. for 1 hour. Add water and chloroform, stir for 15 minutes, let stand to separate layers, wash the organic layer with water, MgSO 4 Dry and concentrate under reduced pressure. The product was purified on a silica gel column (eluent CHCl 3 / MeOH=100 / 5), the present compound (56 mg) was obtained as a white powder.
[0021] Structure Identification: 1 HNMR (DMSO-d6): δ (ppm), 11.30 (s, 1H, NH), 9.99 (s...
preparation Embodiment 2
[0025] The organic compound prepared in step (2) above was placed in a quartz ampoule. The prepared compound was vacuum dehydrated at a temperature of 100°C. The tube was disengaged and placed in a crystal growth furnace. Crystals were grown by the Bridgman method in a double furnace with an insulating film. Finally, colorless strip crystals were obtained. Carry out single crystal X-ray diffraction crystallographic analysis to this crystal, crystallographic parameter is as follows: monoclinic system, its space group is C2 / c, α=γ=90°, β=103±5°.
preparation Embodiment 3
[0027]
[0028]
[0029] Mix various ingredients together, and shear in a shearing kettle until the particle size of the active ingredient is less than 3 μm. The function of the emulsifier is that when it is dispersed on the surface of the dispersant, the formation of a thin film or electric double layer can make the dispersed phase charge, and prevent the small droplets of the dispersed phase from coagulating with each other. Isopropanol and xylene can effectively fuse emulsifiable concentrate with water and maintain its stability.
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