Sodium hydride → 2-[5-Bromo-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester

HRID 71840Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 71840
[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]1[NH:14][C:15]([Br:18])=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH3:21][Si:22]([CH2:25][CH2:26][O:27][CH2:28]Cl)([CH3:24])[CH3:23]>CN(C=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:12][CH2:11][CH2:10][CH:9]1[C:13]1[N:14]([CH2:28][O:27][CH2:26][CH2:25][Si:22]([CH3:24])([CH3:23])[CH3:21])[C:15]([Br:18])=[CH:16][N:17]=1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Komponenten

5

Edukt 3

HCID 24758Sodium hydrideHCID 27242712-Chloromethyl 2-(trimethylsilyl)ethyl etherHCID 56605248tert-Butyl 2-(5-bromo-1H-imidazol-2-yl)pyrrolidine-1-carboxylate

Produkt 1

HCID 574202132-[5-Bromo-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl esterAusbeute 83 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
0 °C

Versuchsvorschrift

2-(5-Bromo-1H-imidazol-2-yl)-pyrrolidine-1-carboxylic acid tert-butyl ester (4 g, 12.65 mmol) was dissolved in DMF and cooled to 0° C. NaH (658 mg of 60% mineral oil dispersion, 16.45 mmol) was added and the reaction mixture was aged for 13 min before addition of SEMCl (2.7 mL, 15.18 mmol) and warming to RT. After 16 h, the reaction was quenched by water, diluted with ethyl acetate (300 mL) and washed with water and brine. The organic phase was dried over magnesium sulfate and concentrated. The crude residue was purified by silica column chromatography (10% to 30% EtOAc/hexanes) to afford 2-[5-Bromo-1-(2-trimethylsilanyl-ethoxymethyl)-1H-imidazol-2-yl]-pyrrolidine-1-carboxylic acid tert-butyl ester (4.67 g, 83%).

Aufarbeitung

  1. temperaturewarming to RT
  2. customthe reaction was quenched by water
  3. additiondiluted with ethyl acetate (300 mL)
  4. washwashed with water and brine
  5. dry with materialThe organic phase was dried over magnesium sulfate
  6. concentrationconcentrated
  7. customThe crude residue was purified by silica column chromatography (10% to 30% EtOAc/hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-e95881e179a6453b8fa039f58a9eca54
Quelldatensatz
uspto-grants-2014_09
Patentnummer
US08822430B2

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