Dichloromethane → 3-[7-(2-Methoxy-phenyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]-N,N-dimethyl-benzamide

HRID 2389023Notes

Reaction equation

HRID 2389023 reaction equation
Br[C:2]1[N:3]=[C:4]2[C:10]([C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][C:12]=3[O:17][CH3:18])=[CH:9][N:8](S(C3C=CC(C)=CC=3)(=O)=O)[C:5]2=[N:6][CH:7]=1.[CH3:29][N:30]([CH3:42])[C:31]([C:33]1[CH:34]=[C:35](B(O)O)[CH:36]=[CH:37][CH:38]=1)=[O:32].C(=O)(O)[O-].[Na+].ClCCl>C(#N)C.CCOC(C)=O.Cl[Pd-2](Cl)(P(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)P(C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1.CO>[CH3:18][O:17][C:12]1[CH:13]=[CH:14][CH:15]=[CH:16][C:11]=1[C:10]1[C:4]2[C:5](=[N:6][CH:7]=[C:2]([C:37]3[CH:38]=[C:33]([CH:34]=[CH:35][CH:36]=3)[C:31]([N:30]([CH3:42])[CH3:29])=[O:32])[N:3]=2)[NH:8][CH:9]=1

Participants

9

Reactant 4

HCID 6344DichloromethaneHCID 516892Sodium Bicarbonate2×HCID 27733923-(Dimethylcarbamoyl)benzeneboronic acidHCID 598360452-Bromo-7-(2-methoxy-phenyl)-5-(toluene-4-sulfonyl)-5H-pyrrolo[2,3-b]pyrazine

Product 1

HCID 598361763-[7-(2-Methoxy-phenyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]-N,N-dimethyl-benzamideYield 54%

Reagents, catalysts & solvents 4

HCID 178418903HCID 178418903, compoundCatalystHCID 887MethanolSolventHCID 6342AcetonitrileSolventHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of 2-Bromo-7-(2-methoxy-phenyl)-5-(toluene-4-sulfonyl)-5H-pyrrolo[2,3-b]pyrazine (30 mg, 0.065 mmol), 3-dimethylaminocarbonylphenyl boronic acid (25.3 mg, 0.130 mmol) and dichlorobis(triphenylphosphino)palladium(II) (2.5 mg, 0.003 mmol) in acetonitrile (1 mL) and aqueous solution of sodium bicarbonate (2M, 1 mL) was irradiated in a Personal Chemistry Optimizer at 90° C. for 15 minutes. The crude reaction mixture was distributed between dichloromethane and a saturated aqueous solution of sodium bicarbonate. The aqueous phase was then extracted with dichloromethane and the combined organic phases were dried over sodium sulfate, filtered and concentrated. The crude brown residue was then dissolved in MeOH (5 mL), 5N KOH (50 μL) and the mixture was stirred at room temperature for 75 minutes. Removal of the solvents resulted in a yellow residue, which was then purified by flash silica gel chromatography using a gradient of ethyl acetate in hexanes, then 10% MeOH in EtOAc to afford 3-[7-(2-Methoxy-phenyl)-5H-pyrrolo[2,3-b]pyrazin-2-yl]-N,N-dimethyl-benzamide (13.0 mg, 54% yield) as a pale yellow solid. 1H-NMR (500 MHz, CD3OD) δ 8.89 (m, 1H), 8.80 (m, 1H), 8.40 (m, 1H), 8.25 (m, 2H), 7.62 (m, 1H), 7.50 (m, 1H), 7.25 (m, 1H), 7.10 (m, 2H), 3.97 (m, 3H), 3.17 (m, 3H), 3.10 (m, 3H). MS: m/z 373.1 [MH+].

Workup

  1. customwas irradiated in a Personal Chemistry Optimizer at 90° C. for 15 minutes
  2. customThe crude reaction mixture
  3. extractionThe aqueous phase was then extracted with dichloromethane
  4. dry with materialthe combined organic phases were dried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated
  7. dissolutionThe crude brown residue was then dissolved in MeOH (5 mL)
  8. customRemoval of the solvents
  9. customresulted in a yellow residue, which
  10. customwas then purified by flash silica gel chromatography

Sources & evidence

ORD record
ord-f10d6d7307624c79b9fb00585a16d4dd
Source dataset
uspto-grants-2012_09
Patent number
US08268994B2

Reaction notes

Loading…