Sodium hydride → 2-[4-(4-Bromo-phenyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 79894

Reaktionsgleichung

Reaktionsgleichung von HRID 79894
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([OH:13])[CH2:10][CH:9]1[C:14]1[NH:15][C:16]([C:19]2[CH:24]=[CH:23][C:22]([Br:25])=[CH:21][CH:20]=2)=[CH:17][N:18]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH3:28][Si:29]([CH2:32][CH2:33][O:34][CH2:35]Cl)([CH3:31])[CH3:30]>CN(C=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH:11]([OH:13])[CH2:10][CH:9]1[C:14]1[N:18]([CH2:35][O:34][CH2:33][CH2:32][Si:29]([CH3:31])([CH3:30])[CH3:28])[CH:17]=[C:16]([C:19]2[CH:24]=[CH:23][C:22]([Br:25])=[CH:21][CH:20]=2)[N:15]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Komponenten

5

Edukt 3

HCID 24758Sodium hydrideHCID 27242712-Chloromethyl 2-(trimethylsilyl)ethyl etherHCID 666203882-[5-(4-Bromo-phenyl)-1H-imidazol-2-yl]-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester

Produkt 1

HCID 666211532-[4-(4-Bromo-phenyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl esterAusbeute 98 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Versuchsvorschrift

2-[5-(4-Bromo-phenyl)-1H-imidazol-2-yl]-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester (500 mg) was dissolved in DMF (8 mL), and NaH (54 mg ) was added. The mixture was stirred over 10 min. and SEM-Cl was added slowly, and then stirred for 2 hours. The mixture was quenched with 3 mL of sat. NH4Cl and was taken up in ethyl acetate (100 mL). The organic phase was washed with saturated sodium bicarbonate (1×100 mL) and dried over sodium sulfate. After the solvent was removed, the resulting oil was subjected to silica gel chromatography using effluent of 20-50% ethyl acetate and hexanes. The fractions containing product were combined and the solvent was removed under reduced pressure to provide 2-[4-(4-Bromo-phenyl)-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-4-hydroxy-pyrrolidine-1-carboxylic acid tert-butyl ester (648 mg, 98%) as an off-white solid.

Aufarbeitung

  1. stirringstirred for 2 hours
  2. customThe mixture was quenched with 3 mL of sat. NH4Cl
  3. washThe organic phase was washed with saturated sodium bicarbonate (1×100 mL)
  4. dry with materialdried over sodium sulfate
  5. customAfter the solvent was removed
  6. additionThe fractions containing product
  7. customthe solvent was removed under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-2aab5d59963347258f2f6d9907a2e1ad
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08841278B2

Verknüpfte Notizen

Wird geladen…