Water → 3'-Acetyl-1'-benzyloxymethyl-1,3-dimethyl-spiro[1,2,3,4-tetrahydroquinazoline-4,4'-imidazolidine]-2,2',5'-trione

HRID 34549Notes

Reaction equation

HRID 34549 reaction equation
[C:1]([N:4]1[C:8]2([C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[NH:11][C:10](=[O:18])[N:9]2[CH3:19])[C:7](=[O:20])[N:6]([CH2:21][O:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)[C:5]1=[O:30])(=[O:3])[CH3:2].[CH3:31]I.[H-].[Na+].O>CN(C)C=O>[C:1]([N:4]1[C:8]2([C:17]3[C:12](=[CH:13][CH:14]=[CH:15][CH:16]=3)[N:11]([CH3:31])[C:10](=[O:18])[N:9]2[CH3:19])[C:7](=[O:20])[N:6]([CH2:21][O:22][CH2:23][C:24]2[CH:25]=[CH:26][CH:27]=[CH:28][CH:29]=2)[C:5]1=[O:30])(=[O:3])[CH3:2]

Participants

6

Reactant 4

HCID 962WaterHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 142300003'-Acetyl-1'-benzyloxymethyl-3-methyl-spiro[1,2,3,4-tetrahydroquinazoline-4,4'-imidazolidine]-2,2',5'-trione

Product 1

HCID 142300013'-Acetyl-1'-benzyloxymethyl-1,3-dimethyl-spiro[1,2,3,4-tetrahydroquinazoline-4,4'-imidazolidine]-2,2',5'-trioneYield 94.5%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

3'-Acetyl-1'-benzyloxymethyl-3-methyl-spiro[1,2,3,4-tetrahydroquinazoline-4,4'-imidazolidine]-2,2',5'trione (3.06 g) is dissolved in dimethylformamide (20 ml) and thereto is added methyl iodide (1 ml) and further added in portions sodium hydride (60%) (0.3 g) under ice-cooling, and the mixture is stirred at room temperature for 30 minutes. To the reaction mixture is added water, and the mixture is extracted with ethyl acetate. The extract is dried and distilled to remove the solvent. The residue is purified by silica gel column chromatography (solvent: chloroform) to give 3'-acetyl-1'-benzyloxymethyl-1,3-dimethyl-spiro[1,2,3,4-tetrahydroquinazoline-4,4'-imidazolidine]-2,2',5'-trione (3 g, yield: 94.5%) as an oily substance.

Workup

  1. temperaturecooling
  2. extractionthe mixture is extracted with ethyl acetate
  3. customThe extract is dried
  4. distillationdistilled
  5. customto remove the solvent
  6. customThe residue is purified by silica gel column chromatography (solvent: chloroform)

Sources & evidence

ORD record
ord-a4c9ad1d85d041e6b9ebee9a7b113dca
Source dataset
uspto-grants-1988_08
Patent number
US04762839

Reaction notes

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