Phenol → HCID 86657872, compound

HRID 1898541Notes

Reaction equation

HRID 1898541 reaction equation
Br[C:2]1[N:3]=[C:4]2[C:10]([CH:11]=[O:12])=[CH:9][N:8]([CH2:13][O:14][CH2:15][CH2:16][Si:17]([CH3:20])([CH3:19])[CH3:18])[C:5]2=[N:6][CH:7]=1.[C:21]1([OH:27])[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1.[O-]P([O-])([O-])=O.[K+].[K+].[K+]>CC([O-])=O.CC([O-])=O.[Pd+2].C(P(C(C)(C)C)C1C=CC=CC=1C1C=CC=CC=1N(C)C)(C)(C)C>[O:27]([C:2]1[N:3]=[C:4]2[C:10]([CH:11]=[O:12])=[CH:9][N:8]([CH2:13][O:14][CH2:15][CH2:16][Si:17]([CH3:20])([CH3:19])[CH3:18])[C:5]2=[N:6][CH:7]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1

Participants

6

Reactant 3

HCID 996PhenolHCID 62657Potassium Phosphate, TribasicHCID 578296122-bromo-5-((2-(trimethylsilyl)ethoxy)methyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde

Product 1

HCID 86657872HCID 86657872, compoundYield 61.3%

Reagents, catalysts & solvents 2

HCID 167845palladium(II) acetateCatalystHCID 27349362-Di-tert-butylphosphino-2'-(N,N-dimethylamino)biphenylCatalyst

Conditions

Temperature
150 °C

Procedure

A mixture of 2-bromo-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde (3.29 g, 9.23 mmol), phenol (1.04 g, 11.08 mmol), K3PO4 (3.92 g, 18.46 mmol), [2′-(di-tert-butyl-phosphanyl)-biphenyl-2-yl]-dimethyl-amine (0.157 g, 0.46 mmol), Pd(OAc)2 (0.103 g, 0.46 mmol) and degassed toluene (50 mL) was stirred under nitrogen in a sealed tube at 150° C. overnight. The reaction mixture was cooled to room temperature and partitioned between ethyl acetate and water. The aqueous layer was extracted with ethyl acetate, and the combined organic layers were dried over MgSO4, filtered and concentrated. The residue was purified by SiO2 column chromatography (0-30% EtOAc/hexanes) to afford 2.09 g (61%) of 2-phenoxy-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carbaldehyde as a beige solid.

Workup

  1. customdegassed toluene (50 mL)
  2. temperatureThe reaction mixture was cooled to room temperature
  3. custompartitioned between ethyl acetate and water
  4. extractionThe aqueous layer was extracted with ethyl acetate
  5. dry with materialthe combined organic layers were dried over MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customThe residue was purified by SiO2 column chromatography (0-30% EtOAc/hexanes)

Sources & evidence

ORD record
ord-bf5326cfce7f4475bf399bbdda93b020
Source dataset
uspto-grants-2013_08
Patent number
US08518945B2

Reaction notes

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