Chalcones derived from β-ionone and their preparation method and application
A technology for ionone and chalcone, which is applied in the field of chalcone compounds derived from beta-ionone and their preparation, can solve the report that the preparation method of beta-ionone chalcone compounds has not yet been used to control pests and other problems, to achieve the effect of obvious green bug attracting activity, less by-products, and simple process
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[0034] The embodiment of the present invention provides a preparation method of chalcones derived from β-ionone, specifically as follows:
[0035] Dissolve 4.6mmol of β-ionone and 6.0mmol of substituted cinnamaldehyde in 10mL of ethanol respectively, add them to a 50mL three-necked flask, slowly add 15mL of 1mmol / mL sodium hydroxide aqueous solution to the three-necked flask, and stir at room temperature to react, thin layer Analyze and monitor reactions.
[0036] After the reaction was complete, the pH was adjusted to 6-7 with 10% hydrochloric acid solution, followed by extraction with diethyl ether twice (50 mL of diethyl ether each time), and the organic phase was dried and concentrated.
[0037] The target compound was obtained by column chromatography using petroleum ether and ethyl acetate as eluents.
[0038] The structure, physical and chemical parameters and infrared data of the obtained product are shown in Table 1.
[0039] The H NMR spectrum and high resolution m...
experiment example 1
[0045] Experimental Example 1 Determination of the Attractive Activity of Chalcones Derived from β-Ionone to Lygus Chrysophylla
[0046] Dissolve the product prepared in the embodiment of the present invention in dichloromethane, take the solution and add it to rubber lures (each rubber lure contains 10 mg of medicine), and after the dichloromethane solvent has evaporated, add clean dichloromethane , so that the chalcones derived from β-ionone fully penetrate into the rubber; after the dichloromethane solvent is volatilized again, wrap the lure with tin foil, put it in a ziplock bag and place it in a -4°C refrigerator for later use.
[0047] In the alfalfa field, the trapping test of Lygus spp. was carried out, and the specific operation was as follows: select the alfalfa field with the same growth, consistent management conditions, and large and neat plots as the experimental field, and fix the above-mentioned lures prepared on the boat-type trap (simultaneously, with CK and ...
experiment example 2
[0052] Experimental example 2 Determination of the insecticidal activity of chalcones derived from β-ionone against diamondback moth and Tetranychus cinnabarinus
[0053]Dissolve the product (3 mg) obtained in the example of the present invention in a mixed solvent (2.5 mL) of acetone / methanol (1:1), add 2.5 mL of standing tap water containing 2‰ Tween 80, and stir to obtain 600 mg / L of the solution to be tested.
[0054] A 10 mg / L imidacloprid solution was used as a positive control, and acetone / methanol / water (1:1:2, containing 1‰ Tween 80) was used as a blank control.
[0055] According to the standard operating procedure of insecticide micro-screening, the Airbrush spray method was used. The sprayer was a VL-type airbrush produced by Paasche Airbrush Company in the United States, and the spray pressure was 10psi (approximately 0.7kg / cm2). 2 ), the spray volume is 0.5mL, and the spray distance is 15-20cm.
[0056] See Table 4 for the tested targets (Plutella xylostella x...
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