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

HRID 2067338노트

반응식

HRID 2067338 반응식
[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]

참가 물질

7

반응물 4

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

생성물 1

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

시약·촉매·용매 2

HCID 6344Dichloromethane용매HCID 8028Tetrahydrofuran용매

실험 절차

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).

후처리

  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)

출처 및 근거

ORD 기록
ord-cff9a5fea9b342778c8633fd23e4199c
출처 데이터셋
uspto-grants-2012_10
특허 번호
US08293768B2

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