Water → 2-[7-(methylthio)-2H-pyrazolo[4,3-d]pyrimidin-2-yl]ethyl benzoate

HRID 1786849Notes

Reaction equation

HRID 1786849 reaction equation
[CH3:1][S:2][C:3]1[C:4]2[NH:11][N:10]=[CH:9][C:5]=2[N:6]=[CH:7][N:8]=1.[C:12]([O:20][CH2:21][CH2:22]I)(=[O:19])[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.C(=O)([O-])[O-].[K+].[K+].O>CN(C)C=O.C(OCC)(=O)C>[C:12]([O:20][CH2:21][CH2:22][N:11]1[C:4]2[C:3]([S:2][CH3:1])=[N:8][CH:7]=[N:6][C:5]=2[CH:9]=[N:10]1)(=[O:19])[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1.[C:12]([O:20][CH2:21][CH2:22][N:10]1[CH:9]=[C:5]2[N:6]=[CH:7][N:8]=[C:3]([S:2][CH3:1])[C:4]2=[N:11]1)(=[O:19])[C:13]1[CH:18]=[CH:17][CH:16]=[CH:15][CH:14]=1

Participants

8

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 125101182-Iodoethyl BenzoateHCID 552958947-(methylthio)-1H-pyrazolo[4,3-d]pyrimidine

Product 2

HCID 675209472-[7-(methylthio)-2H-pyrazolo[4,3-d]pyrimidin-2-yl]ethyl benzoateHCID 675211322-[7-(methylthio)-1H-pyrazolo[4,3-d]pyrimidin-1-yl]ethyl benzoate

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
60 °C

Procedure

To a solution of 7-(methylthio)-1H-pyrazolo[4,3-d]pyrimidine (300 mg) and 2-iodoethyl benzoate (548 mg) in N,N-dimethylformamide (10 mL) was added potassium carbonate (374 mg), and the mixture was stirred at 60° C. for 1 hr. After the completion of the reaction, water was added to the reaction mixture. The mixture was diluted with ethyl acetate and washed with water and saturated brine. The organic layer was dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:2) to give 2-[7-(methylthio)-1H-pyrazolo[4,3-d]pyrimidin-1-yl]ethyl benzoate (266 mg) and 2-[7-(methylthio)-2H-pyrazolo[4,3-d]pyrimidin-2-yl]ethyl benzoate (191 mg) both as pale-yellow solids.

Workup

  1. additionwas added to the reaction mixture
  2. washwashed with water and saturated brine
  3. dry with materialThe organic layer was dried over anhydrous magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by silica gel column chromatography (hexane:ethyl acetate=3:2)

Sources & evidence

ORD record
ord-86ec5f319157400a82c7853df2ab732b
Source dataset
uspto-grants-2009_03
Patent number
US07507740B2

Reaction notes

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