Water → HCID 12202396, compound

HRID 1076578Notes

Reaction equation

HRID 1076578 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[C:8]1[C:9]2[CH:17]=[CH:16][S:15][C:10]=2[NH:11][C:12](=[O:14])[N:13]=1.[H-].[Na+].[CH3:20]I.O>CN(C)C=O>[CH3:20][O:14][C:12]1[N:13]=[C:8]([C:3]2[CH:4]=[CH:5][CH:6]=[CH:7][C:2]=2[F:1])[C:9]2[CH:17]=[CH:16][S:15][C:10]=2[N:11]=1

Participants

6

Reactant 4

HCID 962WaterHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 178517451HCID 178517451, compound

Product 1

HCID 12202396HCID 12202396, compound

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent2×

Conditions

Temperature
60 °C

Procedure

To a solution of 9.49 g of 4-(o-fluorophenyl)-1,2-dihydrothieno[2,3-d]pyrimidin-2-one in 200 ml of dimethylformamide is added 1.76 g of 63% sodium hydride. The mixture is stirred at 60°C for 1 hour. The mixture is cooled to room temperature and 10.93 g of methyl iodide in 33 ml of dimethylformamide is added dropwise thereto. The mixture is stirred for 2 hours at room temperature. The reaction mixture is poured into water and extracted with chloroform. The chloroform extracts are washed with water, dried over sodium sulfate, and the solvent is removed under reduced pressure. The residue is chromatographed on silica gel, using chloroform as an eluent. From the first fraction, 2-methoxy-4-(o-fluorophenyl)-thieno[2,3-d]pyrimidine is obtained as crystals having a melting point of 175° - 176.5°C (after recrystallization from ethanol). From the second fraction, 1-methyl-4-(o-fluorophenyl)-1,2-dihydrothieno[2,3-d]pyrimidin-2-one is obtained as crystals having a melting point of 222° - 223°C (after recrystallization from ethanol). From the third fraction, 3-methyl-4-(o-fluorophenyl)-3H-thieno[2,3-d]pyrimidin-2-one is obtained as crystals having a melting point of 191° - 192.5°C (after recrystallization from ethanol).

Workup

  1. temperatureThe mixture is cooled to room temperature
  2. stirringThe mixture is stirred for 2 hours at room temperature
  3. extractionextracted with chloroform
  4. washThe chloroform extracts are washed with water
  5. dry with materialdried over sodium sulfate
  6. customthe solvent is removed under reduced pressure
  7. customThe residue is chromatographed on silica gel

Sources & evidence

ORD record
ord-15a64fbd56d74d9593597710bbd854ca
Source dataset
uspto-grants-1976_05
Patent number
US03957783

Reaction notes

Loading…