Reaktion #76795

Reaktionsgleichung

(R)-(−)-5′-Bromospiro[1-azabicyclo[2.2.2]octane-3,2′(3′H)-furo[2,3-b]pyridine]

trimethylsilylacetylene

triethylamine

→

title compound

Ausbeute 90.0%

(R)-(−)-5′-(2-Trimethylsilylethynyl)spiro[1-azabicyclo[2.2.2]octane-3,2′(3′H)-furo[2,3-b]pyridine]

Ausbeute 90.0%

Lösungsmittel

acetonitrile

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.ADDITIONcontaining a magnetic stir bar
2. 2
   Sonstigepurged with argon
3. 3
   Sonstigesealed with a Teflon plug and FETFE O-ring
4. 4
   Temperaturcooled to room temperature
5. 5
   workup.DISSOLUTIONdissolved in chloroform (25 mL)
6. 6
   Waschenwashed with saturated aqueous sodium carbonate (2 mL)
7. 7
   Trocknendried (MgSO4)
8. 8
   Sonstigeevaporated under reduced pressure
9. 9
   SonstigePurification by flash chromatography through silica gel (eluting with ammoniated ether/methanol, 9:1)

Vorschrift

(R)-(−)-5′-Bromospiro[1-azabicyclo[2.2.2]octane-3,2′(3′H)-furo[2,3-b]pyridine](295 mg, 1 mmol), trimethylsilylacetylene (0.355 mL, 2.5 mmol), tetrakis(triphenylphosphine)palladium (230 mg, 0.2 mmol), triethylamine (2 mL) and anhydrous acetonitrile (2 mL) were combined in a heavy-walled threaded glass tube containing a magnetic stir bar, purged with argon and sealed with a Teflon plug and FETFE O-ring. The mixture was stirred and heated at 100° C. for 4 hours, cooled to room temperature, dissolved in chloroform (25 mL), washed with saturated aqueous sodium carbonate (2 mL), dried (MgSO4), and evaporated under reduced pressure. Purification by flash chromatography through silica gel (eluting with ammoniated ether/methanol, 9:1) afforded the title compound (280 mg, 0.90 mmol, 90%): chemical ionization MS (m/z, relative intensity) 313 ([MH]+, 30).

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