Imidazole → N'-((2R,3R)-3-(tert-Butyldimethylsilyloxy)-2-(3-chloro-4-cyano-2-methylphenylamino)butanoyl)-4-nitrobenzohydrazide

HRID 563331노트

반응식

HRID 563331 반응식
[Cl:1][C:2]1[C:3]([CH3:30])=[C:4]([NH:10][C@H:11]([C@H:27]([OH:29])[CH3:28])[C:12]([NH:14][NH:15][C:16](=[O:26])[C:17]2[CH:22]=[CH:21][C:20]([N+:23]([O-:25])=[O:24])=[CH:19][CH:18]=2)=[O:13])[CH:5]=[CH:6][C:7]=1[C:8]#[N:9].N1C=CN=C1.[CH3:36][C:37]([Si:40](Cl)([CH3:42])[CH3:41])([CH3:39])[CH3:38]>CN(C=O)C>[Si:40]([O:29][C@H:27]([CH3:28])[C@@H:11]([NH:10][C:4]1[CH:5]=[CH:6][C:7]([C:8]#[N:9])=[C:2]([Cl:1])[C:3]=1[CH3:30])[C:12]([NH:14][NH:15][C:16](=[O:26])[C:17]1[CH:22]=[CH:21][C:20]([N+:23]([O-:25])=[O:24])=[CH:19][CH:18]=1)=[O:13])([C:37]([CH3:39])([CH3:38])[CH3:36])([CH3:42])[CH3:41]

참가 물질

5

반응물 3

HCID 795ImidazoleHCID 28928tert-Butyldimethylsilyl chlorideHCID 67006072N'-((2R,3R)-2-(3-Chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoyl)-4-nitrobenzohydrazide

생성물 1

HCID 59193039N'-((2R,3R)-3-(tert-Butyldimethylsilyloxy)-2-(3-chloro-4-cyano-2-methylphenylamino)butanoyl)-4-nitrobenzohydrazide수율 56%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

실험 절차

To a pre-cooled (0° C.) solution of N′-((2R,3R)-2-(3-chloro-4-cyano-2-methylphenylamino)-3-hydroxybutanoyl)-4-nitrobenzohydrazide (12.0 g, 27.79 mmol) in DMF (650 mL) was added imidazole (15.13 g, 222.31 mmol) then TBSCl (16.75 g, 111.15 mmol). The reaction was warmed slowly to room temperature, stirred for 72 h, cooled to 0° C. and quenched with H2O (600 mL). The solution was extracted with EtOAc (700 mL). The organic extract was washed with H2O (2×300 mL) and 5% aq. citric acid (3×250 mL), dried (Na2SO4), filtered and concentrated under reduced pressure to provide a light yellow oil, which was purified by flash chromatography over silica gel (30-40% EtOAc in hexanes) to provide the title compound as a colourless solid (8.50 g, 56%): 1H NMR (400 MHz, d6-DMSO, δ in ppm) 10.93 (s, 1H), 10.57 (s, 1H), 8.34 (dm, J=8.8 Hz, 2H), 8.07 (dm, J=9.0 Hz, 2H), 7.59 (d, J=8.6 Hz, 1H), 6.84 (d, J=9.0 Hz, 1H), 5.69 (d, J=8.4 Hz, 1H), 5.28 (s, 1H), 4.38 (pentet, J=6.3 Hz, 1H), 4.16 (dd, J=6.5, 8.0 Hz, 1H), 2.26 (s, 3H), 1.27 (d, J=6.3 Hz, 3H), 0.85 (s, 9H), 0.08 (s, 3H), 0.05 (s, 3H).

후처리

  1. temperaturecooled to 0° C.
  2. customquenched with H2O (600 mL)
  3. extractionThe solution was extracted with EtOAc (700 mL)
  4. extractionThe organic extract
  5. washwas washed with H2O (2×300 mL) and 5% aq. citric acid (3×250 mL)
  6. dry with materialdried (Na2SO4)
  7. filtrationfiltered
  8. concentrationconcentrated under reduced pressure
  9. customto provide a light yellow oil, which
  10. customwas purified by flash chromatography over silica gel (30-40% EtOAc in hexanes)

출처 및 근거

ORD 기록
ord-bf40df4a81f14f7ea0184ad2deedbd08
출처 데이터셋
uspto-grants-2011_11
특허 번호
US08067448B2

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