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Chemical Structure| 299405-24-6 Chemical Structure| 299405-24-6

Structure of 299405-24-6

Chemical Structure| 299405-24-6

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Product Details of [ 299405-24-6 ]

CAS No. :299405-24-6
Formula : C9H11F3N2O2
M.W : 236.19
SMILES Code : O=C(OCC)CN1N=C(C(F)(F)F)C=C1C
MDL No. :MFCD00658793

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Application In Synthesis of [ 299405-24-6 ]

* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.

  • Downstream synthetic route of [ 299405-24-6 ]

[ 299405-24-6 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 299405-24-6 ]
  • [ 345637-71-0 ]
YieldReaction ConditionsOperation in experiment
Step E: Preparation of 5-methyl-3-(trifluoromethyl)-lH-pyrazol-l-acetic acid; A mixture of 3-methyl-5-trifluoromethylpyrazole (10.0 g, 66.7 mmol), ethyl bromoacetate (11.1 mL, 100 mmol) and potassium carbonate (18.4 g, 133 mmol) inlambdafN-dimethylformamide (80 mL) was stirred at ambient temperature overnight. The orange mixture was filtered, diluted with ethyl acetate, washed with water and brine, dried (MgSO4) and concentrated under reduced pressure to give 15.7 g of the pyrazole ester. The ester dissolved in tetrahydrofuran (100 mL) was treated with 11 mL of a 50 % aqueous NaOH solution in 90 mL of water, and the mixture was stirred at ambient temperature overnight.The tetrahydrofuran solvent was removed from the mixture by evaporation under reduced pressure. The aqueous solution remaining was washed with ether and then acidified with concentrated hydrochloric acid to lower the pH to 1, resulting formation of a precipitate.The precipitate was collected under filtration, washed with water and dried to give 12.1 g of the title compound as a white solid.1H NMR (Acetone-
A mixture of 3-methyl-5-trifluoromethylpyrazole (10.0 g, 66.7 mmol), ethyl bromoacetate (11.1 mL, 100 mmol) and potassium carbonate (18.4 g, 133 mmol) in 80 mL of lambdaf lambdaf-dimethylformamide was stirred at ambient temperature overnight. The orange mixture was filtered, diluted with ethyl acetate, washed with water and brine, dried over MgSO4 and concentrated under reduced pressure to give 15.7 g of the pyrazole ester. The ester, in 100 mL of tetrahydrofuran, was treated with 11 mL of a 50 % aqueous NaOH solution in 90 mL of water and stirred at ambient temperature overnight. The tetrahydrofuran was removed under reduced pressure and the aqueous solution was washed with ether and acidified with cone. HCl to peta 1 to give a precipitate. The precipitate was filtered, washed with water and dried to give 12.1 g of the title compound as a white solid. 1H NMR (Acetone-d6) 5 2.35 (s, 3H), 5.07 (s, 2H), 6.45 (s, IH).
 

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