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Sodium hydride → (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-(2-bromo-5-nitrobenzyl)-4-methyl-1,3-oxazolidin-2-one

HRID 1994626
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1994626
[F:1][C:2]([F:21])([F:20])[C:3]1[CH:4]=[C:5]([C@H:13]2[O:17][C:16](=[O:18])[NH:15][C@H:14]2[CH3:19])[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.[H-].[Na+].[Br:24][C:25]1[CH:30]=[CH:29][C:28]([N+:31]([O-:33])=[O:32])=[CH:27][C:26]=1[CH2:34]Br>C1COCC1>[F:21][C:2]([F:1])([F:20])[C:3]1[CH:4]=[C:5]([C@H:13]2[O:17][C:16](=[O:18])[N:15]([CH2:34][C:26]3[CH:27]=[C:28]([N+:31]([O-:33])=[O:32])[CH:29]=[CH:30][C:25]=3[Br:24])[C@H:14]2[CH3:19])[CH:6]=[C:7]([C:9]([F:10])([F:11])[F:12])[CH:8]=1
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 3

HCID 24758Sodium hydrideHCID 109025011-Bromo-2-(bromomethyl)-4-nitrobenzeneHCID 23583229(4S,5R)-5-(3,5-bis(trifluoromethyl)phenyl)-4-methyloxazolidin-2-one

Produkt 1

HCID 86603442(4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-(2-bromo-5-nitrobenzyl)-4-methyl-1,3-oxazolidin-2-one

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028
Tetrahydrofuran
Lösungsmittel
3×

Versuchsvorschrift

To a solution of (4S,5R)-5-[3,5-bis(trifluoromethyl) phenyl]-4-methyl-1,3-oxazolidin-2-one (5.3 g, 16.95 mmol) in THF (100 mL) at 0° C., NaH (746 mg, 60 w/w % in mineral oil, 18.65 mmol, 1.1 eq.) was added in one portion. The resulting foaming mixture was stirred in an ice bath. Additional THF (100 mL) was added into the reaction. The mixture was stirred at 0° C. for 30 min. A solution of 1-bromo-2-(bromomethyl)-4-nitrobenzene (5.0 g, 16.95 mmol) in THF (25 mL) was added. The resulting mixture was stirred cold for 30 min and then allowed to warm to ambient. The reaction was completed in 1.5 h. The reaction was quenched with sat. aqueous NH4Cl (100 mL). Crude mixture was extracted with EtOAc, and dried over Na2SO4. The resulting clear gel was purified by SiO2 (Biotage 40M cartridge, EtOAc/hexane, gradient, 25% to 45%). The titled compound was obtained as a crystalline solid. LC-MS: 529.11 (M+1)+. 1H NMR (CDCl3, 500 MHz) δ 8.24 (d, J=2.5 Hz, 1H), 8.07 (dd, J=8.7, 2.8 Hz, 1H), 7.91 (s, 1H), 7.79-7.83 (m, 3H), 5.82 (d, J=7.8 Hz, 1H), 4.82 (d, J=16.2 Hz, 1H), 4.44 (d, J=16.3, 1H), 4.11-4.20 (m, 1H), 0.84 (d, J=6.6 Hz, 3H).

Aufarbeitung

  1. stirringThe mixture was stirred at 0° C. for 30 min
  2. stirringThe resulting mixture was stirred cold for 30 min
  3. temperatureto warm to ambient
  4. customThe reaction was quenched with sat. aqueous NH4Cl (100 mL)
  5. extractionCrude mixture was extracted with EtOAc
  6. dry with materialdried over Na2SO4
  7. customThe resulting clear gel was purified by SiO2 (Biotage 40M cartridge, EtOAc/hexane, gradient, 25% to 45%)

Quellen und Nachweise

ORD-Eintrag
ord-b4803ac37b1c48129f59d6c1c6b3e351
Quelldatensatz
uspto-grants-2010_01
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US07652049B2

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