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

HRID 48517

Reaction equation

HRID 48517 reaction equation
Br[C:2]1[CH:3]=[C:4]2[CH2:10][C@:9]3([CH:15]4[CH2:16][CH2:17][N:12]([CH2:13][CH2:14]4)[CH2:11]3)[O:8][C:5]2=[N:6][CH:7]=1.[CH3:18][Si:19]([C:22]#[CH:23])([CH3:21])[CH3:20].C(N(CC)CC)C>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.C(#N)C>[CH3:18][Si:19]([CH3:21])([CH3:20])[C:22]#[C:23][C:2]1[CH:3]=[C:4]2[CH2:10][C@:9]3([CH:15]4[CH2:16][CH2:17][N:12]([CH2:13][CH2:14]4)[CH2:11]3)[O:8][C:5]2=[N:6][CH:7]=1

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 66111TrimethylsilylacetyleneHCID 54506690(2R)-5'-bromo-3'H-spiro[4-azabicyclo[2.2.2]octane-2,2'-furo[2,3-b]pyridine]

Product 1

HCID 54357741(R)-(-)-5'-(2-Trimethylsilylethynyl)spiro[1-azabicyclo[2.2.2]octane-3,2'(3'H)-furo[2,3-b]pyridine]Yield 90%

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 6342AcetonitrileSolvent

Conditions

Temperature
100 °C

Procedure

(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).

Workup

  1. additioncontaining a magnetic stir bar
  2. custompurged with argon
  3. customsealed with a Teflon plug and FETFE O-ring
  4. temperaturecooled to room temperature
  5. dissolutiondissolved in chloroform (25 mL)
  6. washwashed with saturated aqueous sodium carbonate (2 mL)
  7. dry with materialdried (MgSO4)
  8. customevaporated under reduced pressure
  9. customPurification by flash chromatography through silica gel (eluting with ammoniated ether/methanol, 9:1)

Sources & evidence

ORD record
ord-916899a19c28497e909a2862eb131f4d
Source dataset
uspto-grants-2004_03
Patent number
US06703502B2

Linked notes

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