3,3-Dibromo-1,3-dihydro-1-((2-(trimethylsilyl)ethoxy)methyl)-2H-pyrrolo(2,3-b)pyridin-2-one → 1-{[2-(Trimethylsilyl)ethoxy]methyl}-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one

HRID 1671598Notes

Reaction equation

HRID 1671598 reaction equation
Br[C:2]1(Br)[C:10]2[C:5](=[N:6][CH:7]=[CH:8][CH:9]=2)[N:4]([CH2:11][O:12][CH2:13][CH2:14][Si:15]([CH3:18])([CH3:17])[CH3:16])[C:3]1=[O:19]>C1COCC1.[Cl-].[NH4+].[Zn]>[CH3:16][Si:15]([CH3:18])([CH3:17])[CH2:14][CH2:13][O:12][CH2:11][N:4]1[C:5]2=[N:6][CH:7]=[CH:8][CH:9]=[C:10]2[CH2:2][C:3]1=[O:19]

Participants

5

Reactant 1

HCID 574588853,3-Dibromo-1,3-dihydro-1-((2-(trimethylsilyl)ethoxy)methyl)-2H-pyrrolo(2,3-b)pyridin-2-one

Product 1

HCID 574588861-{[2-(Trimethylsilyl)ethoxy]methyl}-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one

Reagents, catalysts & solvents 3

HCID 23994ZincCatalystHCID 8028TetrahydrofuranSolventHCID 25517Ammonium ChlorideSolvent

Procedure

Zinc (100 g, 1.54 mol) was added to a solution of 3,3-dibromo-1-{[2-(trimethylsilyl)ethoxy]methyl}-1,3-dihydro-2H-pyrrolo[2,3-b]pyridin-2-one from Step B (65 g, 0.154 mol) in THF (880 mL) and saturated aqueous ammonium chloride (220 mL). After 3 h, the reaction was filtered and concentrated in vacuo. The residue was partitioned between EtOAc and H2O which resulted in the formation of a white precipitate. Both layers were filtered through a Celite pad and the layers were separated. The aqueous layer was washed with EtOAc (2×) and the combined organic layers were washed with H2O, dried over MgSO4, filtered, and concentrated. The crude product was filtered through a plug of silica gel eluting with CH2Cl2:EtOAc-90:10 and the eluant was concentrated under reduced pressure to provide the title compound. MS: m/z=265 (M+1).

Workup

  1. filtrationthe reaction was filtered
  2. concentrationconcentrated in vacuo
  3. customThe residue was partitioned between EtOAc and H2O which
  4. customresulted in the formation of a white precipitate
  5. filtrationBoth layers were filtered through a Celite pad
  6. customthe layers were separated
  7. washThe aqueous layer was washed with EtOAc (2×)
  8. washthe combined organic layers were washed with H2O
  9. dry with materialdried over MgSO4
  10. filtrationfiltered
  11. concentrationconcentrated
  12. filtrationThe crude product was filtered through a plug of silica gel eluting with CH2Cl2
  13. concentrationEtOAc-90:10 and the eluant was concentrated under reduced pressure

Sources & evidence

ORD record
ord-f6d84a1ade8240d08c752f32c4a8a2c1
Source dataset
uspto-grants-2011_08
Patent number
US07994325B2

Reaction notes

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