Water → 4'-[2-Propoxy-5-(hydroxyiminomethyl)-4-vinylimidazol-1-ylmethyl]-3'-fluorobiphenyl-2-carboxylic acid t-butyl ester

HRID 883500Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 883500
[C:1]([O:5][C:6]([C:8]1[C:9]([C:14]2[CH:19]=[CH:18][C:17]([CH2:20][N:21]3[C:25]([CH:26]=O)=[C:24]([CH:28]=[CH2:29])[N:23]=[C:22]3[O:30][CH2:31][CH2:32][CH3:33])=[C:16]([F:34])[CH:15]=2)=[CH:10][CH:11]=[CH:12][CH:13]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].Cl.[NH2:36][OH:37].O>N1C=CC=CC=1>[C:1]([O:5][C:6]([C:8]1[C:9]([C:14]2[CH:19]=[CH:18][C:17]([CH2:20][N:21]3[C:25]([CH:26]=[N:36][OH:37])=[C:24]([CH:28]=[CH2:29])[N:23]=[C:22]3[O:30][CH2:31][CH2:32][CH3:33])=[C:16]([F:34])[CH:15]=2)=[CH:10][CH:11]=[CH:12][CH:13]=1)=[O:7])([CH3:2])([CH3:4])[CH3:3]

Komponenten

5

Edukt 3

HCID 962WaterHCID 443297Hydroxyamine hydrochlorideHCID 598308974'-(2-Propoxy-5-formyl-4-vinylimidazol-1-ylmethyl)-3'-fluorobiphenyl-2-carboxylic acid t-butyl ester

Produkt 1

HCID 725729564'-[2-Propoxy-5-(hydroxyiminomethyl)-4-vinylimidazol-1-ylmethyl]-3'-fluorobiphenyl-2-carboxylic acid t-butyl esterAusbeute 99,6 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 1049PyridineLösungsmittel

Reaktionsbedingungen

Temperatur
40 °C

Versuchsvorschrift

Intermediate (18b) (7.2 g, 15.5 mmol) was dissolved in pyridine (30 mL). Hydroxylamine hydrochloride (4.0 g, 57.9 mmol) was added followed by water (20 mL) and the mixture was stirred at 40° C. for 2 hours. The reaction was quenched with water, extracted with 200 mL EtOAc, washed with 3×100 mL 1M phosphoric acid, 1×100 mL saturated sodium bicarbonate solution, and 2×100 mL saturated aqueous NaCl, then dried over MgSO4, filtered and concentrated in vacuo. The crude product was purified by silica gel chromatography (0-80% EtOAc:hexanes) to yield intermediate (18c) as a white solid (7.4 g). Anal. HPLC retention time=4.9 minutes. Gradient conditions: 25% solvent B/75% solvent A to 95% solvent B/5% solvent A over 6 minutes. MS m/z: [M+H+] calcd for C27H30FN3O4, 480.23. found 480.4. 1H-NMR (DMSO-d6) 10.99 (1H, s), 8.21 (1H, s), 7.67 (1H, d), 7.54 (1H, m), 7.44 (1H, s), 7.34 (1H, m), 7.11 (2H, m), 6.81 (2H, m), 5.73 (1H, d), 5.36 (2H, s), 5.10 (1H, d), 1.66 (2H, m), 1.13 (9H, s), 0.85 (4H, m).

Aufarbeitung

  1. customThe reaction was quenched with water
  2. extractionextracted with 200 mL EtOAc
  3. washwashed with 3×100 mL 1M phosphoric acid, 1×100 mL saturated sodium bicarbonate solution, and 2×100 mL saturated aqueous NaCl
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated in vacuo
  7. customThe crude product was purified by silica gel chromatography (0-80% EtOAc:hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-c0de7c1d64b24304b26286a5a202b5a1
Quelldatensatz
uspto-grants-2012_08
Patentnummer
US08236846B2

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