3-(2-Nitrophenyl)-2-oxopropanoic acid → 2-Hydroxy-3-(2-nitrophenyl)propanoic acid

HRID 65481

Reaktionsgleichung

Reaktionsgleichung von HRID 65481
N1CCC[C@H]1C(O)=O.[BH4-].[Na+].[N+:11]([C:14]1[CH:19]=[CH:18][CH:17]=[CH:16][C:15]=1[CH2:20][C:21](=[O:25])[C:22]([OH:24])=[O:23])([O-:13])=[O:12]>O1CCCC1>[OH:25][CH:21]([CH2:20][C:15]1[CH:16]=[CH:17][CH:18]=[CH:19][C:14]=1[N+:11]([O-:13])=[O:12])[C:22]([OH:24])=[O:23]

Komponenten

5

Edukt 3

HCID 795833-(2-Nitrophenyl)-2-oxopropanoic acidHCID 145742L-ProlineHCID 4311764Sodium borohydride

Produkt 1

HCID 136517582-Hydroxy-3-(2-nitrophenyl)propanoic acid

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel2×

Versuchsvorschrift

L-(-)-proline (7.50 g., 65.1 mmol) and sodium borohydride (2.46 g., 65.1 mmol) were stirred in tetrahydrofuran under nitrogen for sixteen hours. Recrystallized o-nitrophenylpyruvic acid (14.17 g., 76.5 mmol) in tetrahydrofuran (50 ml.) was added dropwise, and the resulting solution was stirred at room temperature for six days. The solvent was evaporated and the resulting gum was stirred with 10% aqueous HCl (200 ml.) for 4.5 hours. A small amount of solid was filtered to provide nearly racemic α-hydroxy-2-nitrobenzenepropanoic acid, 1.25 g., m.p. 98°-102° C., [α]D25 -4.21° (c 2.045, EtOH).

Aufarbeitung

  1. customThe solvent was evaporated
  2. stirringthe resulting gum was stirred with 10% aqueous HCl (200 ml.) for 4.5 hours
  3. filtrationA small amount of solid was filtered

Quellen und Nachweise

ORD-Eintrag
ord-725cd63d53144f3d95e654d32e6ed4d5
Quelldatensatz
uspto-grants-1986_09
Patentnummer
US04614806

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