Water → 1-(4-chlorobutyl)-5-methylpyrimidine-2,4(1H,3H)-dione

HRID 1640457

Reaction equation

HRID 1640457 reaction equation
[OH:1][C:2]1[C:7]([CH3:8])=[CH:6][NH:5][C:4](=[O:9])[N:3]=1.C([O-])([O-])=O.[K+].[K+].Br[CH2:17][CH2:18][CH2:19][CH2:20][Cl:21].O>CS(C)=O>[Cl:21][CH2:20][CH2:19][CH2:18][CH2:17][N:5]1[CH:6]=[C:7]([CH3:8])[C:2](=[O:1])[NH:3][C:4]1=[O:9]

Participants

6

Reactant 4

HCID 962WaterHCID 11430Potassium CarbonateHCID 813641-Bromo-4-chlorobutaneHCID 178430899HCID 178430899, compound

Product 1

HCID 593375871-(4-chlorobutyl)-5-methylpyrimidine-2,4(1H,3H)-dioneYield 41%

Reagents, catalysts & solvents 1

HCID 679Dimethyl SulfoxideSolvent

Procedure

10.1 g (80.0 mmol) of 4-hydroxy-5-methylpyrimidin-2(1H)-one (thymine) in 300 ml of dimethyl sulfoxide (DMSO) and 11.1 g (80.0 mmol) of K2CO3 were stirred at room temperature for 1 hour. Then 13.7 g (80.0 mmol) of 1-bromo-4-chlorobutane were added dropwise to the mixture, and the reaction mixture was then stirred at room temperature for 5 hours. Water was added to the reaction mixture, and it was then extracted with ethyl acetate. The aqueous phase was then neutralized and extracted with methylene chloride. Drying of the organic phase, removal of the desiccant by filtration and evaporation of the solvent to dryness in vacuo resulted in 7.1 g of the title compound

Workup

  1. extractionwas then extracted with ethyl acetate
  2. extractionextracted with methylene chloride
  3. customDrying of the organic phase, removal of the
  4. filtrationdesiccant by filtration and evaporation of the solvent to dryness in vacuo

Sources & evidence

ORD record
ord-b162710974be453188102109c39d2459
Source dataset
uspto-grants-2012_02
Patent number
US08114875B2

Linked notes

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