1-(2-Fluorophenyl)piperazine → 6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methylthieno[2,3-d]pyrimidin-4(3H)-one

HRID 1094717Notes

Reaction equation

HRID 1094717 reaction equation
[CH3:1][C:2]1[C:10]2[C:9](=[O:11])[NH:8][CH:7]=[N:6][C:5]=2[S:4][C:3]=1[C:12]([OH:14])=O.CCN(C(C)C)C(C)C.[F:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][C:26]=1[N:31]1[CH2:36][CH2:35][NH:34][CH2:33][CH2:32]1.CN(C(ON1N=NC2C=CC=NC1=2)=[N+](C)C)C.F[P-](F)(F)(F)(F)F>CN(C=O)C.CCOC(C)=O>[F:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][C:26]=1[N:31]1[CH2:36][CH2:35][N:34]([C:12]([C:3]2[S:4][C:5]3[N:6]=[CH:7][NH:8][C:9](=[O:11])[C:10]=3[C:2]=2[CH3:1])=[O:14])[CH2:33][CH2:32]1

Participants

7

Reactant 4

HCID 705291-(2-Fluorophenyl)piperazineHCID 81531DiisopropylethylamineHCID 4058025-methyl-4-oxo-3H,4H-thieno[2,3-d]pyrimidine-6-carboxylic acidHCID 9886157Methanaminium, N-((dimethylamino)(3H-1,2,3-triazolo(4,5-b)pyridin-3-yloxy)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1)

Product 1

HCID 160032576-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methylthieno[2,3-d]pyrimidin-4(3H)-oneYield 86%

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of 5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid, (2 g, 9.5 mmol) in DMF (20 mL) was added DIEA (5 mL, 28.5 mmol), 1-(2-fluorophenyl)piperazine (1.7 g, 9.5 mmol), and HATU (4.7 g, 12.3 mmol). The reaction mixture was stirred at RT overnight. The reaction mixture was diluted with EtOAc (60 mL) and the organic layer was washed successively with sat. NaHCO3 aq. (50 mL) and brine (50 mL). The organic layer was separated, dried over Na2SO4, and concentrated to give crude product as a gummy solid. Purification by flash column chromatography using EtOAc as the eluant afforded the 3.0 g of pure 6-(4-(2-fluorophenyl)piperazine-1-carbonyl)-5-methylthieno[2,3-d]pyrimidin-4(3H)-one, (yield: 86%).

Workup

  1. washthe organic layer was washed successively with sat. NaHCO3 aq. (50 mL) and brine (50 mL)
  2. customThe organic layer was separated
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated
  5. customto give crude product as a gummy solid
  6. customPurification by flash column chromatography

Sources & evidence

ORD record
ord-4ac7f9f4632744449296a912aa6db347
Source dataset
uspto-grants-2012_03
Patent number
US08133998B2

Reaction notes

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