Dimethyl Sulfoxide → 2,4-dimethyl-6-{[2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl}-7-propyl[1,2,4]triazolo[1,5-a]pyrimidin-5(4H)-one

HRID 1688868Notes

Reaction equation

HRID 1688868 reaction equation
[Cl-].O[NH3+:3].[C:4](=[O:7])([O-])[OH:5].[Na+].CS(C)=O.[CH3:13][C:14]1[N:42]=[C:17]2[N:18]([CH3:41])[C:19](=[O:40])[C:20]([CH2:25][C:26]3[CH:31]=[CH:30][C:29]([C:32]4[C:33]([C:38]#[N:39])=[CH:34][CH:35]=[CH:36][CH:37]=4)=[CH:28][CH:27]=3)=[C:21]([CH2:22][CH2:23][CH3:24])[N:16]2[N:15]=1>C(OCC)(=O)C>[CH3:13][C:14]1[N:42]=[C:17]2[N:18]([CH3:41])[C:19](=[O:40])[C:20]([CH2:25][C:26]3[CH:31]=[CH:30][C:29]([C:32]4[CH:37]=[CH:36][CH:35]=[CH:34][C:33]=4[C:38]4[NH:3][C:4](=[O:7])[O:5][N:39]=4)=[CH:28][CH:27]=3)=[C:21]([CH2:22][CH2:23][CH3:24])[N:16]2[N:15]=1

Participants

6

Reactant 4

HCID 679Dimethyl SulfoxideHCID 21645Hydroxylamine HClHCID 516892Sodium BicarbonateHCID 670096194'-[(2,4-Dimethyl-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)methyl]biphenyl-2-carbonitrile

Product 1

HCID 1360638562,4-dimethyl-6-{[2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl}-7-propyl[1,2,4]triazolo[1,5-a]pyrimidin-5(4H)-oneYield 53.3%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
40 °C

Procedure

A mixture of hydroxylammonium chloride (1.77 g), sodium hydrogen carbonate (2.84 g) and dimethyl sulfoxide (15 mL) was stirred at 40° C. for 30 min, 4′-[(2,4-dimethyl-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)methyl]biphenyl-2-carbonitrile (0.67 g) was added, and the mixture was stirred at 90° C. for 16 hr. The reaction mixture was diluted with ethyl acetate, and the mixture was washed with water and then with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was dissolved in tetrahydrofuran (15 mL). N,N′-Carbonyldiimidazole (0.33 g) and then 1,8-diazabicyclo[5.4.0]undec-7-ene (0.28 mL) were added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was diluted with ethyl acetate, and the mixture was washed with saturated aqueous potassium hydrogensulfate solution and then with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography to give the title compound as a colorless solid (0.41 g, 53%).

Workup

  1. stirringthe mixture was stirred at 90° C. for 16 hr
  2. washthe mixture was washed with water
  3. dry with materialwith saturated brine, and dried over anhydrous magnesium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. dissolutionthe residue was dissolved in tetrahydrofuran (15 mL)
  6. additionN,N′-Carbonyldiimidazole (0.33 g) and then 1,8-diazabicyclo[5.4.0]undec-7-ene (0.28 mL) were added
  7. stirringthe mixture was stirred at room temperature for 2 hr
  8. additionThe reaction mixture was diluted with ethyl acetate
  9. washthe mixture was washed with saturated aqueous potassium hydrogensulfate solution
  10. dry with materialwith saturated brine, and dried over anhydrous magnesium sulfate
  11. customThe solvent was evaporated under reduced pressure
  12. customthe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-31a444bda0904b6ca3eac17947fece45
Source dataset
uspto-grants-2012_04
Patent number
US08148383B2

Reaction notes

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