Tetrahydrofuran → 1-(3,4,5-Trimethoxybenzyl)-3-(4-fluorophenylmethyl)-3-(3-t-butyldimethylsilyloxypropyl)-2-oxopyrrolidine

HRID 323494

Reaktionsgleichung

[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:24]=[C:25]([O:29][CH3:30])[C:26]=1[O:27][CH3:28])[CH2:6][N:7]1[CH2:11][CH2:10][CH:9]([CH2:12][CH2:13][CH2:14][O:15][Si:16]([C:19]([CH3:22])([CH3:21])[CH3:20])([CH3:18])[CH3:17])[C:8]1=[O:23].O1CCCC1.C([Li])(CC)C.[F:41][C:42]1[CH:49]=[CH:48][C:45]([CH2:46]Br)=[CH:44][CH:43]=1>C(OCC)(=O)C.CCCCCC.O>[CH3:1][O:2][C:3]1[CH:4]=[C:5]([CH:24]=[C:25]([O:29][CH3:30])[C:26]=1[O:27][CH3:28])[CH2:6][N:7]1[CH2:11][CH2:10][C:9]([CH2:46][C:45]2[CH:48]=[CH:49][C:42]([F:41])=[CH:43][CH:44]=2)([CH2:12][CH2:13][CH2:14][O:15][Si:16]([C:19]([CH3:22])([CH3:21])[CH3:20])([CH3:18])[CH3:17])[C:8]1=[O:23]

Komponenten

Reaktionsbedingungen

Temperatur: -78 °C

Versuchsvorschrift

Combine 1-(3,4,5-trimethoxybenzyl)-3-(3-(t-butyldimethylsilyloxy)propyl)-2-oxopyrrolidine (0.71 g, 1.62 mmol) and tetrahydrofuran (10 mL). Cool to −78° C. using a dry-ice/acetone bath. Add a solution of sec-butyl lithium (1.37 mL, 1.3 M in hexane, 1.78 mmol). After 30 minutes, add 4-fluorobenzyl bromide (0.34 g, 1.78 mmol). After 15 minutes, warm slowly to ambient temperature. After 12 hours, add water and extract three times with ethyl acetate. Dry the combined organic layers over Na2SO4, filter, and concentrate in vacuo to obtain a residue. Chromatograph the residue on silica gel eluting with 1/1 ethyl acetate/hexane to give the title compound.

Aufarbeitung

waitAfter 15 minutes
temperaturewarm slowly to ambient temperature
waitAfter 12 hours
extractionextract three times with ethyl acetate
dry with materialDry the combined organic layers over Na2SO4
filtrationfilter
concentrationconcentrate in vacuo
customto obtain a residue

Quellen und Nachweise

ORD-Eintrag: ord-b96792c495954cdcacfd5987bd81e23e
Quelldatensatz: uspto-grants-2001_04
DOI: 10.6084/m9.figshare.5104873.v1
Patentnummer: US06211199B1

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