Methyl iodide → 7-methanesulfonyl-1-methyl-3-(2-methyl-5-nitro-phenyl)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one

HRID 2222241Notes

Reaction equation

HRID 2222241 reaction equation
[H-].[Na+].[CH3:3][S:4]([C:7]1[N:12]=[C:11]2[NH:13][C:14](=[O:27])[N:15]([C:17]3[CH:22]=[C:21]([N+:23]([O-:25])=[O:24])[CH:20]=[CH:19][C:18]=3[CH3:26])[CH2:16][C:10]2=[CH:9][N:8]=1)(=[O:6])=[O:5].I[CH3:29]>CN(C=O)C.C(OCC)(=O)C>[CH3:3][S:4]([C:7]1[N:12]=[C:11]2[N:13]([CH3:29])[C:14](=[O:27])[N:15]([C:17]3[CH:22]=[C:21]([N+:23]([O-:25])=[O:24])[CH:20]=[CH:19][C:18]=3[CH3:26])[CH2:16][C:10]2=[CH:9][N:8]=1)(=[O:5])=[O:6]

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 597118317-methanesulfonyl-3-(2-methyl-5-nitro-phenyl)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one

Product 1

HCID 685260247-methanesulfonyl-1-methyl-3-(2-methyl-5-nitro-phenyl)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-oneYield 70.4%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To the suspension of NaH (60% dispersion in mineral oil, 139 mg, 3.5 mmol) in DMF is added 7-methanesulfonyl-3-(2-methyl-5-nitro-phenyl)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one (1.15 g, 3.2 mmol), prepared as in Reference 1, at 0° C. When H2 evolution has ceased, iodomethane (0.99 ml, 15.8 mmol) is added and the reaction mixture is stirred for 3 hours at room temperature. The mixture is diluted with ethyl acetate, and washed with 5% aqueous Na2S2O3 solution to remove DMF. The organic layer is dried over MgSO4 and concentrated under reduced pressure. The crude product is purified by flash column chromatography (SiO2, EtOAc/hexane=1/1) to give 7-methanesulfonyl-1-methyl-3-(2-methyl-5-nitro-phenyl)-3,4-dihydro-1H-pyrimido[4,5-d]pyrimidin-2-one (0.85 g, 70%) as a white solid.

Workup

  1. additionis added
  2. customat 0° C
  3. washwashed with 5% aqueous Na2S2O3 solution
  4. customto remove DMF
  5. dry with materialThe organic layer is dried over MgSO4
  6. concentrationconcentrated under reduced pressure
  7. customThe crude product is purified by flash column chromatography (SiO2, EtOAc/hexane=1/1)

Sources & evidence

ORD record
ord-d197c94f398140e887432229f0a955a0
Source dataset
uspto-grants-2008_05
Patent number
US07371750B2

Reaction notes

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