Ethyl bromoacetate → ethyl (4-{6-[(2'-cyanobiphenyl-4-yl)methyl]-5-oxo-7-propylpyrazolo[1,5-a]pyrimidin-4(5H)-yl}phenoxy)acetate

HRID 2048603Notes

Reaction equation

HRID 2048603 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([N:8]2[C:13](=[O:14])[C:12]([CH2:15][C:16]3[CH:21]=[CH:20][C:19]([C:22]4[C:23]([C:28]#[N:29])=[CH:24][CH:25]=[CH:26][CH:27]=4)=[CH:18][CH:17]=3)=[C:11]([CH2:30][CH2:31][CH3:32])[N:10]3[N:33]=[CH:34][CH:35]=[C:9]23)=[CH:4][CH:3]=1.Br[CH2:37][C:38]([O:40][CH2:41][CH3:42])=[O:39].C(=O)([O-])[O-].[Cs+].[Cs+].C(OCC)(=O)C>CN(C)C=O.O>[C:28]([C:23]1[CH:24]=[CH:25][CH:26]=[CH:27][C:22]=1[C:19]1[CH:20]=[CH:21][C:16]([CH2:15][C:12]2[C:13](=[O:14])[N:8]([C:5]3[CH:4]=[CH:3][C:2]([O:1][CH2:37][C:38]([O:40][CH2:41][CH3:42])=[O:39])=[CH:7][CH:6]=3)[C:9]3[N:10]([N:33]=[CH:34][CH:35]=3)[C:11]=2[CH2:30][CH2:31][CH3:32])=[CH:17][CH:18]=1)#[N:29]

Participants

7

Reactant 4

HCID 7748Ethyl bromoacetateHCID 8857Ethyl AcetateHCID 10796Cesium carbonateHCID 670088984'-{[4-(4-Hydroxyphenyl)-5-oxo-7-propyl-4,5-dihydropyrazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile

Product 1

HCID 86644072ethyl (4-{6-[(2'-cyanobiphenyl-4-yl)methyl]-5-oxo-7-propylpyrazolo[1,5-a]pyrimidin-4(5H)-yl}phenoxy)acetateYield 75%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
70 °C

Procedure

To a solution of 4′-{[4-(4-hydroxyphenyl)-5-oxo-7-propyl-4,5-dihydropyrazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile (0.92 g) in N,N-dimethylformamide (10 mL) were added ethyl bromoacetate (0.66 mL) and cesium carbonate (1.3 g) and the mixture was stirred at 70° C. for 15 hr. The mixture was allowed to cool, ethyl acetate and water were added, and the mixture was extracted with ethyl acetate. The organic layer was washed with water and saturated brine, dried over anhydrous magnesium sulfate, and concentrated. The residue was purified by silica gel column chromatography to give the title compound as a pale-yellow amorphous solid (0.82 g, 75%).

Workup

  1. temperatureto cool
  2. extractionthe mixture was extracted with ethyl acetate
  3. washThe organic layer was washed with water and saturated brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated
  6. customThe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-c27984dd65c24933ad0f33e5a4f963e3
Source dataset
uspto-grants-2013_11
Patent number
US08592431B2

Reaction notes

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