Sodium hydride → 4-Chloro-1-(triisopropylsilyl)-1H-pyrrolo[2,3-b]pyridine

HRID 875662Notes

Reaction equation

HRID 875662 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[NH:8][CH:9]=[CH:10][C:3]=12.[H-].[Na+].[CH:13]([Si:16](Cl)([CH:20]([CH3:22])[CH3:21])[CH:17]([CH3:19])[CH3:18])([CH3:15])[CH3:14].[Cl-].[NH4+]>C1COCC1>[Cl:1][C:2]1[CH:7]=[CH:6][N:5]=[C:4]2[N:8]([Si:16]([CH:20]([CH3:22])[CH3:21])([CH:17]([CH3:19])[CH3:18])[CH:13]([CH3:15])[CH3:14])[CH:9]=[CH:10][C:3]=12

Participants

6

Reactant 4

HCID 24758Sodium hydrideHCID 25517Ammonium ChlorideHCID 139400Triisopropylsilyl chlorideHCID 113894934-Chloro-1H-pyrrolo[2,3-b]pyridine

Product 1

HCID 114382724-Chloro-1-(triisopropylsilyl)-1H-pyrrolo[2,3-b]pyridineYield 99%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

4-Chloro-1H-pyrrolo[2,3-b]pyridine (5.0 g, 32.8 mmol) in THF (50 mL) was cooled to 0° C., and NaH (1.64 g, 41.0 mmol, 60% oil dispersion) was added. After 15 minutes, triisopropylsilylchloride (“TIPS-Cl”; 6.94 mL, 32.8 mmol) was added, and the reaction was stirred at room temperature for 1 hour. A saturated ammonium chloride solution (20 mL) was added, and the mixture was extracted with hexanes (40 mL), washed with brine and dried over sodium sulfate. After removal of the solvent, the residue was purified by chromatography (hexanes) to give 4-chloro-1-(triisopropylsilyl)-1H-pyrrolo[2,3-b]pyridine (10.0 g, 99% yield) as an oil.

Workup

  1. extractionthe mixture was extracted with hexanes (40 mL)
  2. washwashed with brine
  3. dry with materialdried over sodium sulfate
  4. customAfter removal of the solvent
  5. customthe residue was purified by chromatography (hexanes)

Sources & evidence

ORD record
ord-f4c1382d775c4e42a4e430867a27dace
Source dataset
uspto-grants-2015_03
Patent number
US08981085B2

Reaction notes

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