Citric Acid → 5-Oxazolidinepropanoic acid, 3-[(1,1-dimethylethoxy)carbonyl]-4-[(2S)-2-[[4-methoxy-3-(3-methoxypropoxy)phenyl]methyl]-3-methylbutyl]-2,2-dimethyl-alpha-(1-methylethyl)-, (alphaS,4S,5S)-

HRID 1779826Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1779826
[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH2:13][C@@H:14]([CH:30]([CH3:32])[CH3:31])[CH2:15][C:16]2[CH:21]=[CH:20][C:19]([O:22][CH3:23])=[C:18]([O:24][CH2:25][CH2:26][CH2:27][O:28][CH3:29])[CH:17]=2)[C@H:11]([CH2:33][C@H:34]([CH:38]=[O:39])[CH:35]([CH3:37])[CH3:36])[O:10][C:9]1([CH3:41])[CH3:40])=[O:7])([CH3:4])([CH3:3])[CH3:2].[Mn]([O-])(=O)(=O)=[O:43].[K+].S([O-])([O-])=O.[Na+].[Na+].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>C1(C)C=CC=CC=1.[Br-].C([N+](CCCC)(CCCC)CCCC)CCC.O>[C:1]([O:5][C:6]([N:8]1[C@@H:12]([CH2:13][C@@H:14]([CH:30]([CH3:32])[CH3:31])[CH2:15][C:16]2[CH:21]=[CH:20][C:19]([O:22][CH3:23])=[C:18]([O:24][CH2:25][CH2:26][CH2:27][O:28][CH3:29])[CH:17]=2)[C@H:11]([CH2:33][C@H:34]([C:38]([OH:43])=[O:39])[CH:35]([CH3:36])[CH3:37])[O:10][C:9]1([CH3:40])[CH3:41])=[O:7])([CH3:4])([CH3:3])[CH3:2]

Komponenten

8

Edukt 4

HCID 311Citric AcidHCID 24437Sodium SulfiteHCID 516875Potassium PermanganateHCID 236253323-Tert-butoxycarbonyl-5(S)-(2(S)-formyl-3-methyl-butyl)-4(S)-(2(S)-isopropyl-3-[4-methoxy-3-(3-methoxypropyloxy)phenyl]-propyl}-2,2-dimethyl-1,3-oxazolidine

Produkt 1

HCID 236254795-Oxazolidinepropanoic acid, 3-[(1,1-dimethylethoxy)carbonyl]-4-[(2S)-2-[[4-methoxy-3-(3-methoxypropoxy)phenyl]methyl]-3-methylbutyl]-2,2-dimethyl-alpha-(1-methylethyl)-, (alphaS,4S,5S)-

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 74236Tetrabutylammonium BromideKatalysatorHCID 962WaterLösungsmittel2×HCID 1140TolueneLösungsmittel

Versuchsvorschrift

53 g of 3-tert-butoxycarbonyl-5(S)-(2(S)-formyl-3-methyl-butyl)-4(S)-{2(S)-isopropyl-3-[4-methoxy-3-(3-methoxypropyloxy)-phenyl]-propyl}-2,2-dimethyl-1,3-oxazolidine are dissolved in 470 ml of toluene, and, at 0° C., 470 ml of water, 79.1 g of potassium permanganate and 9.7 g of tetrabutylammonium bromide are added in succession thereto. The reaction mixture is stirred for a further 48 hours at 0°-5° C., and then, at 10° C., 1.2 liters of 10% sodium sulfite solution are added. After a further 30 minutes, 1.95 liters of 10% citric acid solution and 1.2 liters of water are added. The product is extracted by repeated extraction with ethyl acetate. The extracts are concentrated by evaporation and purified by FC (2.3 kg of silica gel, ethyl acetate/hexane=3:7). The title compound is obtained: Rf (ethyl acetate/hexane=1:2)=0.21.

Aufarbeitung

  1. waitAfter a further 30 minutes
  2. extractionThe product is extracted
  3. extractionextraction with ethyl acetate
  4. concentrationThe extracts are concentrated by evaporation
  5. custompurified by FC (2.3 kg of silica gel, ethyl acetate/hexane=3:7)

Quellen und Nachweise

ORD-Eintrag
ord-34035e155e824cfaa09e3e864350fb8f
Quelldatensatz
uspto-grants-1997_05
Patentnummer
US05627182

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