Water → 5-isopropenyl-1H-pyrrolo[2,3-b]pyridine

HRID 250579Notes

Reaction equation

HRID 250579 reaction equation
C([Si](C(C)C)(C(C)C)[N:5]1[C:9]2=[N:10][CH:11]=[C:12]([C:14](O)([CH3:16])[CH3:15])[CH:13]=[C:8]2[CH:7]=[CH:6]1)(C)C.C([SiH](CC)CC)C.FC(F)(F)C(O)=O.O>C(#N)C>[C:14]([C:12]1[CH:13]=[C:8]2[CH:7]=[CH:6][NH:5][C:9]2=[N:10][CH:11]=1)([CH3:16])=[CH2:15]

Participants

6

Reactant 4

HCID 962WaterHCID 6422Trifluoroacetic acidHCID 12052TriethylsilaneHCID 497589892-(1-(Triisopropylsilyl)-1H-pyrrolo[2,3-b]pyridin-5-yl)propan-2-ol

Product 1

HCID 580868105-isopropenyl-1H-pyrrolo[2,3-b]pyridine

Reagents, catalysts & solvents 1

HCID 6342AcetonitrileSolvent

Procedure

To 2-(1-triisopropylsilanyl-1H-pyrrolo[2,3-b]pyridin-5-yl)-propan-2-ol (97, 0.500 g, 1.5 mmol) in acetonitrile (10.0 mL) were added triethylsilane (1.00 mL, 6.3 mmol) and trifluoroacetic acid (0.50 mL, 6.5 mmol) under an atmosphere of nitrogen. The reaction was refluxed for 3 hours, then cooled down to room temperature. The reaction was poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 50% ethyl acetate in hexane to give the compound (98, 0.200 g, 84%). MS (ESI) [M+H+]+=159.

Workup

  1. temperatureThe reaction was refluxed for 3 hours
  2. extractionextracted with ethyl acetate
  3. washThe organic layer was washed with brine
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationThe filtrate was concentrated
  7. custompurified by silica gel column chromatography
  8. washeluting with 50% ethyl acetate in hexane
  9. customto give the compound (98, 0.200 g, 84%)

Sources & evidence

ORD record
ord-e81521a1e2fd4f7caac3a2062ced92a4
Source dataset
uspto-grants-2011_01
Patent number
US07863288B2

Reaction notes

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