Potassium Carbonate → HCID 59540809, compound

HRID 1677361Notes

Reaction equation

HRID 1677361 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[C:14]2[C:9](=[N:10][CH:11]=[C:12](Br)[N:13]=2)[NH:8][C:7]=1[CH3:16])=[O:5])[CH3:2].[CH3:17][O:18][C:19]1[CH:20]=[C:21](B(O)O)[CH:22]=[C:23]([O:27][CH3:28])[C:24]=1[O:25][CH3:26].C([O-])([O-])=O.[K+].[K+]>CCOC(C)=O.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2]>[CH2:1]([O:3][C:4]([C:6]1[C:14]2[C:9](=[N:10][CH:11]=[C:12]([C:21]3[CH:22]=[C:23]([O:27][CH3:28])[C:24]([O:25][CH3:26])=[C:19]([O:18][CH3:17])[CH:20]=3)[N:13]=2)[NH:8][C:7]=1[CH3:16])=[O:5])[CH3:2]

Participants

6

Reactant 3

HCID 11430Potassium CarbonateHCID 27343903,4,5-Trimethoxybenzeneboronic acidHCID 14416340Ethyl 2-bromo-6-methyl-5H-pyrrolo[2,3-b]pyrazine-7-carboxylate

Product 1

HCID 59540809HCID 59540809, compoundYield 22.4%

Reagents, catalysts & solvents 2

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
100 °C

Procedure

To a flask charged with 2-Bromo-6-methyl-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ethyl ester (360 mg, 1.26 mmol), 3,4,5-trimethoxyphenylboronic acid (320 mg, 1.51 mMol), Pd(dppf)Cl2 (31 mg, 0.038 mmol) was added K2CO3 (520 mg, 3.75 mmol). The mixture was heated to 100° C. overnight. The reaction mixture was cooled, diluted with EtOAc and filtered over celite. The solution was washed with water and brine, dried over Na2SO4, filtered, and concentrated. Flash chromatography afforded 105 mg of 6-Methyl-2-(3,4,5-trimethoxy-phenyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ethyl ester.

Workup

  1. temperatureThe reaction mixture was cooled
  2. filtrationfiltered over celite
  3. washThe solution was washed with water and brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-04d7f26581044bdd8da00d3a0e855e5e
Source dataset
uspto-grants-2011_08
Patent number
US08008298B2

Reaction notes

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