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Acetic Acid → Rac-2-chloro-4-[(2s,3s)-2-(4-fluorobenzyl)-3-hydroxy-5-oxopyrrolidin-1-yl]benzonitrile

HRID 1967408
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Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1967408
[Cl:1][C:2]1[CH:9]=[C:8]([N:10]2[C:14](=[O:15])[CH:13]=[C:12]([OH:16])[CH:11]2[CH2:17][C:18]2[CH:23]=[CH:22][C:21]([F:24])=[CH:20][CH:19]=2)[CH:7]=[CH:6][C:3]=1[C:4]#[N:5].C(O)(=O)C.[BH4-].[Na+].O>C(#N)C.[Cl-].[Na+].O>[Cl:1][C:2]1[CH:9]=[C:8]([N:10]2[C:14](=[O:15])[CH2:13][C@H:12]([OH:16])[C@@H:11]2[CH2:17][C:18]2[CH:19]=[CH:20][C:21]([F:24])=[CH:22][CH:23]=2)[CH:7]=[CH:6][C:3]=1[C:4]#[N:5]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

7

Edukt 4

HCID 176Acetic AcidHCID 962WaterHCID 4311764Sodium borohydrideHCID 595569272-chloro-4-[2-(4-fluorobenzyl)-3-hydroxy-5-oxo-2,5-dihydro-1H-pyrrol-1-yl]benzonitrile

Produkt 1

HCID 59556939Rac-2-chloro-4-[(2s,3s)-2-(4-fluorobenzyl)-3-hydroxy-5-oxopyrrolidin-1-yl]benzonitrileAusbeute 71,3 %

Reagenzien, Katalysatoren, Lösungsmittel

2
HCID 6342AcetonitrileLösungsmittelHCID 57417360Sodium chloride; waterLösungsmittel

Versuchsvorschrift

To a mixture of 2-chloro-4-[2-(4-fluorobenzyl)-3-hydroxy-5-oxo-2,5-dihydro-1H-pyrrol-1-yl]benzonitrile (1.00 g) and acetic acid (1.84 mL) in acetonitrile (10 mL) was added sodium borohydride (276 mg) at 0° C. in small portions. The mixture was warmed to room temperature and stirred for 1 hr. Water and saturated brine were added, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over magnesium sulfate, and the solvent was evaporated under reduced pressure. The obtained residue was purified by basic silica gel column chromatography (eluent: hexane:ethyl acetate=4:1→ethyl acetate), and recrystallized from tetrahydrofuran-hexane to give the title compound as colorless crystals (yield: 717 mg, 71%).

Aufarbeitung

  1. extractionthe mixture was extracted with ethyl acetate
  2. washThe organic layer was washed with saturated brine
  3. dry with materialdried over magnesium sulfate
  4. customthe solvent was evaporated under reduced pressure
  5. customThe obtained residue was purified by basic silica gel column chromatography (eluent: hexane:ethyl acetate=4:1→ethyl acetate)
  6. customrecrystallized from tetrahydrofuran-hexane

Quellen und Nachweise

ORD-Eintrag
ord-778bc017415c4989b3c10d7f245e6e65
Quelldatensatz
uspto-grants-2013_04
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08420694B2

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