Dimethyl Sulfoxide → 3-[2-(2,4-dimethoxyphenyl)-2-oxoethyl]-6-ethyl-1-{[2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl}thieno[2,3-d]pyrimidine-2,4(1H,3H)-dione

HRID 1889489Notes

Reaction equation

HRID 1889489 reaction equation
[Cl-].O[NH3+:3].[C:4](=[O:7])([O-])[OH:5].[Na+].CS(C)=O.[CH3:13][O:14][C:15]1[CH:20]=[C:19]([O:21][CH3:22])[CH:18]=[CH:17][C:16]=1[C:23](=[O:53])[CH2:24][N:25]1[C:30](=[O:31])[C:29]2[CH:32]=[C:33]([CH2:35][CH3:36])[S:34][C:28]=2[N:27]([CH2:37][C:38]2[CH:43]=[CH:42][C:41]([C:44]3[C:45]([C:50]#[N:51])=[CH:46][CH:47]=[CH:48][CH:49]=3)=[CH:40][CH:39]=2)[C:26]1=[O:52]>C(Cl)(Cl)Cl>[CH3:13][O:14][C:15]1[CH:20]=[C:19]([O:21][CH3:22])[CH:18]=[CH:17][C:16]=1[C:23](=[O:53])[CH2:24][N:25]1[C:30](=[O:31])[C:29]2[CH:32]=[C:33]([CH2:35][CH3:36])[S:34][C:28]=2[N:27]([CH2:37][C:38]2[CH:43]=[CH:42][C:41]([C:44]3[CH:49]=[CH:48][CH:47]=[CH:46][C:45]=3[C:50]3[NH:3][C:4](=[O:7])[O:5][N:51]=3)=[CH:40][CH:39]=2)[C:26]1=[O:52]

Participants

6

Reactant 4

HCID 679Dimethyl SulfoxideHCID 21645Hydroxylamine HClHCID 516892Sodium BicarbonateHCID 593517714'-{[3-[2-(2,4-dimethoxyphenyl)-2-oxoethyl]-6-ethyl-2,4-dioxo-3,4-dihydrothieno[2,3-d]pyrimidin-1(2H)-yl]methyl}biphenyl-2-carbonitrile

Product 1

HCID 1360522423-[2-(2,4-dimethoxyphenyl)-2-oxoethyl]-6-ethyl-1-{[2'-(5-oxo-4,5-dihydro-1,2,4-oxadiazol-3-yl)biphenyl-4-yl]methyl}thieno[2,3-d]pyrimidine-2,4(1H,3H)-dioneYield 35%

Reagents, catalysts & solvents 1

HCID 6212ChloroformSolvent

Conditions

Temperature
40 °C

Procedure

A mixture of hydroxylammonium chloride (0.89 g), sodium hydrogencarbonate (1.35 g) and dimethyl sulfoxide (10 mL) was stirred at 40° C. for 30 min, 4′-{[3-[2-(2,4-dimethoxyphenyl)-2-oxoethyl]-6-ethyl-2,4-dioxo-3,4-dihydrothieno[2,3-d]pyrimidin-1(2H)-yl]methyl}biphenyl-2-carbonitrile (0.91 g) was added, and the mixture was stirred at 90° C. for 16 hr. The reaction mixture was diluted with chloroform, washed successively with water and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue was dissolved in methylene chloride (30 mL), N,N′-carbonyldiimidazole (0.26 g) and then 1,8-diazabicyclo[5.4.0]undec-7-ene (0.22 mL) were added, and the mixture was stirred at room temperature for 2 hr. The reaction mixture was diluted with chloroform, washed successively with saturated aqueous potassium hydrogensulfate solution and saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The obtained residue was purified by preparative HPLC to give the title compound as colorless crystals (0.35 g, 35%).

Workup

  1. stirringthe mixture was stirred at 90° C. for 16 hr
  2. washwashed successively with water and saturated brine
  3. dry with materialdried over anhydrous magnesium sulfate
  4. customThe solvent was evaporated under reduced pressure
  5. dissolutionThe residue was dissolved in methylene chloride (30 mL)
  6. additionN,N′-carbonyldiimidazole (0.26 g) and then 1,8-diazabicyclo[5.4.0]undec-7-ene (0.22 mL) were added
  7. stirringthe mixture was stirred at room temperature for 2 hr
  8. additionThe reaction mixture was diluted with chloroform
  9. washwashed successively with saturated aqueous potassium hydrogensulfate solution and saturated brine
  10. dry with materialdried over anhydrous magnesium sulfate
  11. customThe solvent was evaporated under reduced pressure
  12. customThe obtained residue was purified by preparative HPLC

Sources & evidence

ORD record
ord-ea11cd8ac1184325bdc8bf0878847121
Source dataset
uspto-grants-2013_08
Patent number
US08501750B2

Reaction notes

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