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Citric Acid → (3S,4R)-1-(tert-butoxycarbonyl)-4-(3,4-dichlorophenyl)pyrrolidine-3-carboxylic acid

HRID 1260940
Notizen
Druckvorschau

Reaktionsgleichung

Reaktionsgleichung von HRID 1260940
C([C@@H]1COC(=O)N1[C:14]([C@H:16]1[C@H:20]([C:21]2[CH:26]=[CH:25][C:24]([Cl:27])=[C:23]([Cl:28])[CH:22]=2)[CH2:19][N:18]([C:29]([O:31][C:32]([CH3:35])([CH3:34])[CH3:33])=[O:30])[CH2:17]1)=[O:15])C1C=CC=CC=1.[OH-].[Li+].C(O)(=O)CC(CC(O)=O)(C(O)=O)[OH:41]>C1COCC1>[C:32]([O:31][C:29]([N:18]1[CH2:19][C@@H:20]([C:21]2[CH:26]=[CH:25][C:24]([Cl:27])=[C:23]([Cl:28])[CH:22]=2)[C@H:16]([C:14]([OH:41])=[O:15])[CH2:17]1)=[O:30])([CH3:33])([CH3:34])[CH3:35]
KomponentenVersuchsvorschriftAufarbeitungQuellen und NachweiseNotizen zur Reaktion

Komponenten

5

Edukt 3

HCID 311Citric AcidHCID 3939Lithium HydroxideHCID 67231603tert-butyl (3S,4R)-3-{[(4R)-4-benzyl-2-oxo-1,3-oxazolidin-3-yl]carbonyl}-4-(3,4-dichlorophenyl)pyrrolidine-1-carboxylate

Produkt 1

HCID 51441165(3S,4R)-1-(tert-butoxycarbonyl)-4-(3,4-dichlorophenyl)pyrrolidine-3-carboxylic acidAusbeute 81 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028
Tetrahydrofuran
Lösungsmittel

Versuchsvorschrift

To a solution of the compound (2.5 g) obtained in step 3 in THF (27 mL) was added 4N aqueous lithium hydroxide solution (3.6 mL) at room temperature, and the mixture was stirred for 60 hr. The reaction mixture was made slightly acidic with aqueous citric acid solution, and the resultant product was extracted with ethyl acetate. The organic layer was washed with water and dried, and the solvent was evaporated under reduced pressure. The obtained residue was purified by silica gel column chromatography (solvent; 0→70% ethyl acetate/hexane) to give (3S,4R)-1-(tert-butoxycarbonyl)-4-(3,4-dichlorophenyl)pyrrolidine-3-carboxylic acid (1.41 g, 81%) as a white powder.

Aufarbeitung

  1. extractionthe resultant product was extracted with ethyl acetate
  2. washThe organic layer was washed with water
  3. customdried
  4. customthe solvent was evaporated under reduced pressure
  5. customThe obtained residue was purified by silica gel column chromatography (solvent; 0→70% ethyl acetate/hexane)

Quellen und Nachweise

ORD-Eintrag
ord-e53fc3c4745b47dcaaa2b46491980895
Quelldatensatz
uspto-grants-2013_06
DOI
10.6084/m9.figshare.5104873.v1
Patentnummer
US08470816B2

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