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Chemical Structure| 874880-33-8 Chemical Structure| 874880-33-8

Structure of 874880-33-8

Chemical Structure| 874880-33-8

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Product Details of [ 874880-33-8 ]

CAS No. :874880-33-8
Formula : C8H7F3N2O
M.W : 204.15
SMILES Code : O=C1N=C(C2CC2)NC(C(F)(F)F)=C1
MDL No. :MFCD00203552

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Application In Synthesis of [ 874880-33-8 ]

* 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 [ 874880-33-8 ]

[ 874880-33-8 ] Synthesis Path-Downstream   1~1

  • 1
  • [ 57297-29-7 ]
  • [ 372-31-6 ]
  • [ 874880-33-8 ]
YieldReaction ConditionsOperation in experiment
52% With potassium carbonate; In water; at 20℃; for 0.25h;Microwave irradiation; General procedure: The corresponding amidine hydrochloride (2.54 mmol) and powdered K2CO3 (5.76 mmol) were dissolved in water (5.0 mL) in a 20-mL vessel. The beta-keto ester (2.31 mmol) was added and the resulting mixture was irradiated for 5?15 min (see Table 2). Upon the end of the reaction (TLC, hexanes/EtOAc, 5:1), the mixture was diluted with sat. aq NH4Cl (5.0 mL) and extracted with CH2Cl2 (3 × 15 mL). The combined organic phases were dried (anhyd Na2SO4) and filtered. The filtrate was rotary evaporated and the obtained crude product was purified by column chromatography [silica gel, hexane/EtOAc mixtures or recrystallized (EtOH)].
To 40 g of sodium methoxide (28percent methanol solution) , 5 g of <strong>[57297-29-7]cyclopropanecarboxamidine hydrochloride</strong> and 7.63 g of 4, 4, 4-trifluoro-3-oxo-butanoic acid ethyl ester were added. This mixture was stirred at 800C for 10 hours and then heated under reflux for 12 hours. The reaction mixture was left standing to cool and then concentrated. To the residue, 10percent hydrochloric acid was added and then a precipitated crystal was collected by filtration. This crystal was washed with water and then dissolved in ethyl acetate. The ethyl acetate solution was dried over anhydrous magnesium sulfate and then concentrated. The residue was washed with hexane to obtain 4.6 g of 2-cyclopropyl-6- trifluoromethylpyrimidin-4-ol . 2-cyclopropyl-6-trifluoromethylpyrimidin-4-ol1H-NMR (DMSO-d6): 1.02-1.14 (m, 4H) , 1.96-2.03 (m, IH) , 6 . 58 ( s , IH ) , 13 . 21 (bs , lH )
 

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