Sodium bis(trimethylsilyl)amide → 4-(3-{2-[3-(Tert-butyl-dimethyl-silanyloxy)-4-phenyl-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl ester

HRID 352575Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 352575
[C:1]([Si:5]([CH3:24])([CH3:23])[O:6][CH:7]([CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=1)[CH2:8][CH2:9][CH:10]1[NH:14][C:13](=[O:15])[CH2:12][CH2:11]1)([CH3:4])([CH3:3])[CH3:2].C[Si]([N-][Si](C)(C)C)(C)C.[Na+].[CH3:35][O:36][C:37](=[O:48])[C:38]1[CH:43]=[CH:42][C:41]([CH2:44][CH2:45][CH2:46]Br)=[CH:40][CH:39]=1>CN(C=O)C>[CH3:35][O:36][C:37](=[O:48])[C:38]1[CH:43]=[CH:42][C:41]([CH2:44][CH2:45][CH2:46][N:14]2[C:13](=[O:15])[CH2:12][CH2:11][CH:10]2[CH2:9][CH2:8][CH:7]([O:6][Si:5]([C:1]([CH3:3])([CH3:2])[CH3:4])([CH3:24])[CH3:23])[CH2:16][C:17]2[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=2)=[CH:40][CH:39]=1

Komponenten

5

Edukt 3

HCID 2724254Sodium bis(trimethylsilyl)amideHCID 10801120Methyl 4-(3-bromopropyl)benzoateHCID 129700855-[3-(Tert-butyl-dimethyl-silanyloxy)-4-phenyl-butyl]-pyrrolidin-2-one

Produkt 1

HCID 129700974-(3-{2-[3-(Tert-butyl-dimethyl-silanyloxy)-4-phenyl-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl esterAusbeute 70,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 6228DimethylformamideLösungsmittel

Reaktionsbedingungen

Temperatur
70 °C

Versuchsvorschrift

To a solution of 5-[3-(tert-butyl-dimethyl-silanyloxy)-4-phenyl-butyl]-pyrrolidin-2-one (3.20 g, 9.21 mmol) in DMF (30 mL) at 0° C. was added NaHMDS (1M in THF, 11.5 mL, 11.5 mmol). After 1 h, 4-(3-bromo-propyl)-benzoic acid methyl ester (2.84 g, 11.0 mmol) was added and the reaction mixture was stirred at 70° C. for 18 h. The DMF was removed in vacuo and the residue was dissolved in EtOAc. The organic solution was washed with water, dried (MgSO4), filtered and concentrated. The residue was purified by medium pressure chromatography (30% EtOAc in hexanes) to yield 3.39 g of 4-(3-{2-[3-(tert-butyl-dimethyl-silanyloxy)-4-phenyl-butyl]-5-oxo-pyrrolidin-1-yl}-propyl)-benzoic acid methyl ester. 1H NMR (CDCl3) (selected peaks) δ7.92 (m, 2H), 7.25-7.09 (m, 7H), 3.86 (s, 3H), 3.80 (m, 1H), 3.61 (m, 1H), 3.46 (m, 1H), 2.90 (m, 1H), 2.78-2.57 (m, 4H), 2.38-2.18 (m, 2H), 0.83 (s, 9H); MS 524.1 (M+1).

Aufarbeitung

  1. customThe DMF was removed in vacuo
  2. dissolutionthe residue was dissolved in EtOAc
  3. washThe organic solution was washed with water
  4. dry with materialdried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customThe residue was purified by medium pressure chromatography (30% EtOAc in hexanes)

Quellen und Nachweise

ORD-Eintrag
ord-45d3d88708554aa4ba375430f0684fff
Quelldatensatz
uspto-grants-2004_06
Patentnummer
US06747054B2

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