Triphenylphosphine → 2-(Azidomethyl)-5-(difluoromethyl)furan

HRID 560565Notes

Reaction equation

HRID 560565 reaction equation
[F:1][CH:2]([F:10])[C:3]1[O:7][C:6]([CH2:8]O)=[CH:5][CH:4]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CCOC(/N=N/C(OCC)=O)=O.C1(P([N:56]=[N+:57]=[N-:58])(C2C=CC=CC=2)=O)C=CC=CC=1>O1CCCC1.ClCCl>[N:56]([CH2:8][C:6]1[O:7][C:3]([CH:2]([F:10])[F:1])=[CH:4][CH:5]=1)=[N+:57]=[N-:58]

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 199401P,P-Diphenylphosphinic azideHCID 5462977Diethyl azodicarboxylateHCID 20079677(5-(Difluoromethyl)furan-2-yl)methanol

Product 1

HCID 866452892-(Azidomethyl)-5-(difluoromethyl)furanYield 77%

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolventHCID 8028TetrahydrofuranSolvent

Procedure

To a solution of (5-(difluoromethyl)furan-2-yl)methanol (0.55 g, 3.72 mmol), triphenylphosphine (1.07 g, 4.09 mmol) and diethylazodicarboxylate (0.64 mL, 4.09 mmol) in anhydrous tetrahydrofuran (20 mL) was added diphenylphosphorylazide (0.88 mL, 4.09 mmol). The reaction mixture was stirred at ambient temperature for 18 hours, diluted with dichloromethane (40 mL) and washed with water and brine. The organic solution was dried over anhydrous sodium sulphate, filtered and concentrated in vacuo. The residue was purified by column chromatography eluted with ethyl acetate/hexane (1/9) to afford 2-(azidomethyl)-5-(difluoromethyl)furan as a yellow oil in 77% yield (0.50 g): 1H NMR (300 MHz, CDCl3) δ 6.61 (d, J=3.3 Hz, 1H), 6.58 (t, J=54.3 Hz, 1H), 6.37 (d, J=3.3 Hz, 1H), 4.30 (s, 2H); MS (ES+) m/z 172.2 (M+1).

Workup

  1. washwashed with water and brine
  2. dry with materialThe organic solution was dried over anhydrous sodium sulphate
  3. filtrationfiltered
  4. concentrationconcentrated in vacuo
  5. customThe residue was purified by column chromatography
  6. washeluted with ethyl acetate/hexane (1/9)

Sources & evidence

ORD record
ord-1943ff4e88df4bb5bf7c745eea596efb
Source dataset
uspto-grants-2011_11
Patent number
US08063084B2

Reaction notes

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