2-Fluoropyridine → HCID 21833686, compound

HRID 1740818Notes

Reaction equation

HRID 1740818 reaction equation
[H-].[Na+].[Cl:3][C:4]1[CH:13]=[C:12]([CH2:14][N:15]2[CH:19]=[CH:18][CH:17]=[N:16]2)[CH:11]=[CH:10][C:5]=1[O:6][CH2:7][CH2:8][OH:9].F[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][N:22]=1>CN(C)C=O>[N:22]1[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=1[O:9][CH2:8][CH2:7][O:6][C:5]1[CH:10]=[CH:11][C:12]([CH2:14][N:15]2[CH:19]=[CH:18][CH:17]=[N:16]2)=[CH:13][C:4]=1[Cl:3]

Participants

5

Reactant 3

HCID 97462-FluoropyridineHCID 24758Sodium hydrideHCID 21833669HCID 21833669, compound

Product 1

HCID 21833686HCID 21833686, compoundYield 91.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent3×

Procedure

To a mixture of 10 ml of anhydrous N,N-dimethylformamide and 24 mg of sodium hydride (60% oil dispersion) was added dropwise an anhydrous N,N-dimethylformamide (5 ml) solution of 500 mg of 2-[2-chloro-4-(l-pyrazolyl)methylphenoxy]-ethanol (produced in Reference Production Example 3 described below) under stirring over 10 minutes. After stirring at 60° to 70° C. for 2 hours, the mixture was cooled to 5° to 10° C., to which an anhydrous N,N-dimethylformamide (5 ml) solution of 250 mg of 2-fluoropyridine was added dropwise over 30 minutes. The mixture was then stirred at room temperature overnight and then at 60° to 70° C. for further 2 hours. After completion of the reaction, the reaction mixture was poured into 50 ml of ice water, which was extracted with twice with 30 ml of toluene. The organic layers were combined, washed with water, dried with anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was subjected to silica gel column chromatography, which afforded 595 mg of 2-chloro-4-(1-pyrazolyl)methylphenyl 2-(2-pyridyloxy)ethyl ether (compound 8). Yield, 91%.

Workup

  1. stirringAfter stirring at 60° to 70° C. for 2 hours
  2. additionwas added dropwise over 30 minutes
  3. stirringThe mixture was then stirred at room temperature overnight
  4. waitat 60° to 70° C. for further 2 hours
  5. customAfter completion of the reaction
  6. extractionwas extracted with twice with 30 ml of toluene
  7. washwashed with water
  8. dry with materialdried with anhydrous magnesium sulfate
  9. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-3dd8218c3ac84c4387c4c924706ed566
Source dataset
uspto-grants-1999_10
Patent number
US05972949

Reaction notes

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