Compound and its application in preparing rice gall mosquito sex attractant
A compound and oxidation reaction technology, which is applied in the preparation of hydroxyl compounds, the preparation of organic compounds, and insect attractants, etc., can solve the problems of sharp reduction in the number of natural enemy populations, improvement of rice gall mosquito resistance, and excessive pesticide residues. Density reduction, low cost, good accuracy
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[0081] The preparation of compound shown in embodiment 1, formula I
[0082] according to figure 1 The synthetic scheme shown in the preparation was carried out.
[0083] 1) Synthesis of (R)-4-methylphenylmethyl sulfoxide (1)
[0084] Under the protection of nitrogen, 200mL of anhydrous dichloromethane, 24.8g of (R.R)-diethyl tartrate, and 16.8g of tetraisopropyl titanium oxide were added to a 500mL Shrek bottle, and then 1.08mL was slowly added dropwise after stirring for 10 minutes. water, the system was stirred at 25°C for 30min, then cooled to -30°C, 8.3g of 4-methylphenyl methyl sulfide and 18.3g of cumene hydroperoxide were slowly added, and the stirring was continued overnight, during which the temperature was kept at -30 ℃. After the reaction, add ferrous sulfate solution and citric acid solution to quench the reaction, extract with ether (200mL×3) and combine the organic phases, anhydrous MgSO 4 The obtained crude product was dried, precipitated under reduced pres...
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