Potassium Carbonate → 2-{4-[(1-cyclobutylpiperidin-4-yl)oxy]phenyl}-8-(difluoromethoxy)-3-methylpyrido[3,4-d]pyrimidin-4(3H)-one

HRID 2422636Notes

Reaction equation

HRID 2422636 reaction equation
[CH:1]1([N:5]2[CH2:10][CH2:9][CH:8]([O:11][C:12]3[CH:17]=[CH:16][C:15]([C:18]4[N:19]([CH3:30])[C:20](=[O:29])[C:21]5[CH:27]=[CH:26][NH:25][C:24](=[O:28])[C:22]=5[N:23]=4)=[CH:14][CH:13]=3)[CH2:7][CH2:6]2)[CH2:4][CH2:3][CH2:2]1.Cl[C:32]([F:37])([F:36])C([O-])=O.[Na+].C(=O)([O-])[O-].[K+].[K+]>C(#N)C.C(OCC)(=O)C>[CH:1]1([N:5]2[CH2:6][CH2:7][CH:8]([O:11][C:12]3[CH:17]=[CH:16][C:15]([C:18]4[N:19]([CH3:30])[C:20](=[O:29])[C:21]5[CH:27]=[CH:26][N:25]=[C:24]([O:28][CH:32]([F:37])[F:36])[C:22]=5[N:23]=4)=[CH:14][CH:13]=3)[CH2:9][CH2:10]2)[CH2:2][CH2:3][CH2:4]1

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 2734985Sodium chlorodifluoroacetate2×HCID 672438532-{4-[(1-Cyclobutylpiperidin-4-yl)oxy]phenyl}-3-methyl-3,7-dihydropyrido[3,4-d]pyrimidine-4,8-dione

Product 1

HCID 672446932-{4-[(1-cyclobutylpiperidin-4-yl)oxy]phenyl}-8-(difluoromethoxy)-3-methylpyrido[3,4-d]pyrimidin-4(3H)-oneYield 9%

Reagents, catalysts & solvents 2

HCID 6342AcetonitrileSolvent2×HCID 8857Ethyl AcetateSolvent

Procedure

2-{4-[(1-Cyclobutylpiperidin-4-yl)oxy]phenyl}-3-methyl-3,7-dihydropyrido[3,4-d]pyrimidine-4,8-dione (50 mg, 0.123 mmol), sodium chlorodifluoroacetate (19 mg, 0.13 mmol) and potassium carbonate (34 mg, 0.25 mmol) were heated under reflux in acetonitrile (1 mL) for 6 hours. Sodium chlorodifluoroacetate (19 mg, 0.13 mmol) and acetonitrile (1 mL) were further added to the reaction solution and heated under reflux for 18 hours. After restored to room temperature, the reaction solution was diluted with ethyl acetate, washed with water and saturated saline water in that order, and the organic layer was dried with magnesium sulfate. The solvent was evaporated off, and the residue was purified through silica gel thin-layer chromatography (chloroform/methanol=9/1) to obtain a low-polar compound, 2-{4-[(1-cyclobutylpiperidin-4-yl)oxy]phenyl}-8-(difluoromethoxy)-3-methylpyrido[3,4-d]pyrimidin-4(3H)-one (4.8 mg, 9%), and a high-polar compound, 2-{4-[(1-cyclobutylpiperidin-4-yl)oxy]phenyl}-7-(difluoromethyl)-3-methyl-3,7-dihydropyrido[3,4-d]pyrimidine-4,8-dione (11.4 mg, 21%) as a pale yellow solid.

Workup

  1. temperatureheated
  2. temperatureunder reflux for 18 hours
  3. customAfter restored to room temperature
  4. washwashed with water and saturated saline water in that order
  5. dry with materialthe organic layer was dried with magnesium sulfate
  6. customThe solvent was evaporated off
  7. customthe residue was purified through silica gel thin-layer chromatography (chloroform/methanol=9/1)

Sources & evidence

ORD record
ord-16c5b26ceb0a4bcfba36682072600c66
Source dataset
uspto-grants-2011_06
Patent number
US07960394B2

Reaction notes

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