Sodium Carbonate → 4-[4-(4-Ethoxy-2-fluoro-phenoxy)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester

HRID 1931650Notes

Reaction equation

HRID 1931650 reaction equation
[CH2:1]([O:3][C:4]1[CH:9]=[CH:8][C:7]([OH:10])=[C:6]([F:11])[CH:5]=1)[CH3:2].[C:12]([O:16][C:17]([N:19]1[CH2:24][CH2:23][CH:22]([N:25]2[C:29]3=[N:30][CH:31]=[N:32][C:33](Cl)=[C:28]3[CH:27]=[N:26]2)[CH2:21][CH2:20]1)=[O:18])([CH3:15])([CH3:14])[CH3:13].C(=O)([O-])[O-].[K+].[K+].C(=O)([O-])[O-].[Na+].[Na+]>CN(C)C=O>[C:12]([O:16][C:17]([N:19]1[CH2:20][CH2:21][CH:22]([N:25]2[C:29]3=[N:30][CH:31]=[N:32][C:33]([O:10][C:7]4[CH:8]=[CH:9][C:4]([O:3][CH2:1][CH3:2])=[CH:5][C:6]=4[F:11])=[C:28]3[CH:27]=[N:26]2)[CH2:23][CH2:24]1)=[O:18])([CH3:15])([CH3:13])[CH3:14]

Participants

6

Reactant 4

HCID 10340Sodium CarbonateHCID 11430Potassium CarbonateHCID 180033714-Ethoxy-2-fluorophenol2×HCID 57964905Tert-butyl 4-(4-chloro-1H-pyrazolo[3,4-D]pyrimidin-1-YL)piperidine-1-carboxylate2×

Product 1

HCID 445141064-[4-(4-Ethoxy-2-fluoro-phenoxy)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl esterYield 39%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
160 °C

Procedure

A mixture of 4-ethoxy-2-fluoro-phenol (Intermediate 5; 125 mg, 0.801 mmol), 4-(4-chloro-pyrazolo[3,4-d]pyrimidin-1-yl)-piperidine-1-carboxylic acid tert-butyl ester (Intermediate 19; 270 mg, 0.801 mmol), and potassium carbonate (244 mg, 1.761 mmol) in 4 mL of dimethylformamide was heated in a microwave oven at 160° C. for 10 min. Saturated sodium carbonate solution was added to the reaction mixture, the precipitate was filtered and the filtrate was extracted with ethyl acetate three times and the combined organic extracts were washed with saturated brine, and dried over sodium sulfate. The mixture was filtered, concentrated and purified by flash silica gel chromatography (4% methanol in dichloromethane) to afford 4-[4-(4-ethoxy-2-fluoro-phenoxy)-pyrazolo[3,4-d]pyrimidin-1-yl]-piperidine-1-carboxylic acid tert-butyl ester (141 mg, 39%) as a white solid. Mass spectrum M+H-Boc=358.

Workup

  1. filtrationthe precipitate was filtered
  2. extractionthe filtrate was extracted with ethyl acetate three times
  3. washthe combined organic extracts were washed with saturated brine
  4. dry with materialdried over sodium sulfate
  5. filtrationThe mixture was filtered
  6. concentrationconcentrated
  7. custompurified by flash silica gel chromatography (4% methanol in dichloromethane)

Sources & evidence

ORD record
ord-56aef257568f4e88bba431589f277d00
Source dataset
uspto-grants-2012_05
Patent number
US08188098B2

Reaction notes

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