Pyrazole → HCID 66879745, compound

HRID 1913634Notes

Reaction equation

HRID 1913634 reaction equation
F[C:2]1[CH:3]=[N:4][CH:5]=[CH:6][C:7]=1[C:8]1[O:9][C:10]2[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][C:11]=2[N:12]=1.[NH:21]1[CH:25]=[CH:24][CH:23]=[N:22]1.C(=O)([O-])[O-].[K+].[K+].CN(C=O)C>O>[N:21]1([C:2]2[CH:3]=[N:4][CH:5]=[CH:6][C:7]=2[C:8]2[O:9][C:10]3[CH:16]=[CH:15][C:14]([C:17]([F:20])([F:19])[F:18])=[CH:13][C:11]=3[N:12]=2)[CH:25]=[CH:24][CH:23]=[N:22]1

Participants

6

Reactant 4

HCID 1048PyrazoleHCID 6228DimethylformamideHCID 11430Potassium CarbonateHCID 668801802-(3-Fluoropyridin-4-yl)-5-(trifluoromethyl)benzoxazole

Product 1

HCID 66879745HCID 66879745, compoundYield 78.3%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Conditions

Temperature
50 °C

Procedure

A mixture of 0.24 g of 2-(3-fluoropyridin-4-yl)-5-(trifluoromethyl)benzoxazole, 0.14 g of pyrazole, 0.69 g of potassium carbonate and 4 ml of DMF was stirred while heating at 50° C. for two hours. Water was added to the reaction mixture, followed by extraction with ethyl acetate twice. The combined organic layers were washed with a saturated sodium chloride solution, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography to give 0.22 g of 2-[3-(pyrazole-1-yl)pyridin-4-yl]-5-(trifluoromethyl)benzoxazole (hereinafter, referred to as “active compound 58”).

Workup

  1. extractionfollowed by extraction with ethyl acetate twice
  2. washThe combined organic layers were washed with a saturated sodium chloride solution
  3. dry with materialdried over anhydrous magnesium sulfate
  4. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-cd17c64451f44c6eb7e6656f0f1d2dbd
Source dataset
uspto-grants-2013_12
Patent number
US08609705B2

Reaction notes

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