Imidazole → (S)-5-(((tert-Butyldimethylsilyl)oxy)methyl)pyrrolidin-2-one

HRID 497069Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 497069
N1C=CN=C1.[OH:6][CH2:7][C@H:8]1[NH:12][C:11](=[O:13])[CH2:10][CH2:9]1.[Si:14](Cl)([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15]>CN(C)C1C=CN=CC=1.C(Cl)Cl>[Si:14]([O:6][CH2:7][C@H:8]1[NH:12][C:11](=[O:13])[CH2:10][CH2:9]1)([C:17]([CH3:20])([CH3:19])[CH3:18])([CH3:16])[CH3:15]

Komponenten

6

Edukt 3

HCID 795ImidazoleHCID 28928tert-Butyldimethylsilyl chlorideHCID 643511(S)-5-(Hydroxymethyl)-2-pyrrolidinone

Produkt 1

HCID 10263224(S)-5-(((tert-Butyldimethylsilyl)oxy)methyl)pyrrolidin-2-oneAusbeute 99,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 142844-(Dimethylamino)pyridineKatalysatorHCID 6344DichloromethaneLösungsmittel2×

Versuchsvorschrift

Imidazole (4.09 g, 60 mmols) and 4-dimethylaminopyridine (100 mg, 0.82 mmol) were added to a CH2Cl2 (85 ml) solution of (5S)-5-(hydroxymethyl)-2-pyrrolidinone (3.14 g, 27.3 mmols). Then, with the mixture being cooled with ice, a CH2Cl2 (15 ml) solution of tert-butyldimethylsilyl chloride (4.53 g, 30 mmols) was added, and the mixture was stirred for 15 hours at room temperature. The solvent was distilled off under reduced pressure, and then the residue was subjected to silica gel column chromatography (SiO2 300 g, MeOH—CHCl3 5:95 v/v) to obtain (5S)-5-[(tert-butyldimethylsilyloxy)methyl]pyrrolidin-2-one (6.22 g, 99.5%): [α]D27+42.32 (c 1.136, CHCl3). IR νmax (film) cm−1: 3242, 1697. 1H-NMR (CDCl3)δ: 5.79 (1H, br), 3.80-3.71 (1H, m), 3.63 (1H, dd, J=9.9, 3.8 Hz), 3.44 (1H, dd, J=9.9, 7.7 Hz), 2.44-2.26 (2H, m), 2.24-2.11 (1H, m), 1.80-1.67 (1H, m), 0.89 (9H, s), 0.06 (6H, s). MS m/z: 230 (M++1), 214 (M+−15), 172 (100%). HRMS: Calculated for C10H20NO2Si: 214.1263 (M+−15). Found: 214.1240 (M+−15).

Aufarbeitung

  1. temperatureThen, with the mixture being cooled with ice
  2. distillationThe solvent was distilled off under reduced pressure

Quellen und Nachweise

ORD-Eintrag
ord-28a780abfe2c4a7ba6f8ffa0d8c6f8fe
Quelldatensatz
uspto-grants-2005_09
Patentnummer
US06949553B2

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