Cesium carbonate → 4'-{[4-(3-{[Tert-butyl(dimethyl)silyl]oxy}-2,2-dimethylpropyl)-2-methyl-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrile

HRID 2048221Notes

Reaction equation

HRID 2048221 reaction equation
[CH3:1][C:2]1[N:29]=[C:5]2[NH:6][C:7](=[O:28])[C:8]([CH2:13][C:14]3[CH:19]=[CH:18][C:17]([C:20]4[C:21]([C:26]#[N:27])=[CH:22][CH:23]=[CH:24][CH:25]=4)=[CH:16][CH:15]=3)=[C:9]([CH2:10][CH2:11][CH3:12])[N:4]2[N:3]=1.Br[CH2:31][C:32]([CH3:43])([CH3:42])[CH2:33][O:34][Si:35]([C:38]([CH3:41])([CH3:40])[CH3:39])([CH3:37])[CH3:36].C(=O)([O-])[O-].[Cs+].[Cs+].CN(C)C(=O)C>C(OCC)(=O)C>[Si:35]([O:34][CH2:33][C:32]([CH3:43])([CH3:42])[CH2:31][N:6]1[C:7](=[O:28])[C:8]([CH2:13][C:14]2[CH:19]=[CH:18][C:17]([C:20]3[C:21]([C:26]#[N:27])=[CH:22][CH:23]=[CH:24][CH:25]=3)=[CH:16][CH:15]=2)=[C:9]([CH2:10][CH2:11][CH3:12])[N:4]2[N:3]=[C:2]([CH3:1])[N:29]=[C:5]12)([C:38]([CH3:39])([CH3:40])[CH3:41])([CH3:36])[CH3:37]

Participants

6

Reactant 4

HCID 10796Cesium carbonateHCID 31374DimethylacetamideHCID 11780954(3-Bromo-2,2-dimethylpropoxy)(tert-butyl)dimethylsilaneHCID 1360412724'-[(2-Methyl-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)methyl]biphenyl-2-carbonitrile

Product 1

HCID 670090144'-{[4-(3-{[Tert-butyl(dimethyl)silyl]oxy}-2,2-dimethylpropyl)-2-methyl-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl]methyl}biphenyl-2-carbonitrileYield 28%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

A mixture of 4′-[(2-methyl-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)methyl]biphenyl-2-carbonitrile (5 g), (3-bromo-2,2-dimethylpropoxy)(tert-butyl)dimethylsilane (4.7 mL), cesium carbonate (8.1 g) and N,N-dimethylacetamide (50 mL) was stirred at 100° C. for 16 hr. The reaction mixture was diluted with ethyl acetate, washed with 5% 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 (2 g, 28%).

Workup

  1. washwashed with 5% aqueous potassium hydrogensulfate solution
  2. dry with materialwith saturated brine, and dried over anhydrous magnesium sulfate
  3. customThe solvent was evaporated under reduced pressure
  4. customthe residue was purified by silica gel column chromatography

Sources & evidence

ORD record
ord-00a550f106c7400a900afad82c051a6b
Source dataset
uspto-grants-2013_11
Patent number
US08592431B2

Reaction notes

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