Acetone → (2S,4R)-1-benzyloxycarbonyl-2-[{3-(ethoxycarbonyl)-2-hydroxypropyl}oxymethyl]-4-methanesulfonyloxypyrrolidine

HRID 703581Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 703581
[CH2:1]([O:8][C:9]([N:11]1[CH2:15][C@H:14]([O:16][S:17]([CH3:20])(=[O:19])=[O:18])[CH2:13][C@H:12]1[CH2:21][O:22][CH2:23][C:24](=[O:30])[CH2:25][C:26]([O:28][CH3:29])=[O:27])=[O:10])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[BH4-].[Na+].[CH3:33]C(C)=O>C(O)C>[CH2:1]([O:8][C:9]([N:11]1[CH2:15][C@H:14]([O:16][S:17]([CH3:20])(=[O:19])=[O:18])[CH2:13][C@H:12]1[CH2:21][O:22][CH2:23][CH:24]([OH:30])[CH2:25][C:26]([O:28][CH2:29][CH3:33])=[O:27])=[O:10])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Komponenten

5

Edukt 3

HCID 180AcetoneHCID 4311764Sodium borohydrideHCID 57247318(2S,4R)-1-benzyloxycarbonyl-2-[{3-(methoxycarbonyl)-2-oxopropyl}oxymethyl]-4-methanesulfonyloxypyrrolidine

Produkt 1

HCID 57248032(2S,4R)-1-benzyloxycarbonyl-2-[{3-(ethoxycarbonyl)-2-hydroxypropyl}oxymethyl]-4-methanesulfonyloxypyrrolidine

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 702EthanolLösungsmittel

Versuchsvorschrift

To a solution of (2S,4R)-1-benzyloxycarbonyl-2-[{3-(methoxycarbonyl)-2-oxopropyl}oxymethyl]-4-methanesulfonyloxypyrrolidine (7 g) in ethanol (80 ml) was added by portions sodium borohydride (1.2 g) at 0° C. After 6 hours, to the reaction mixture was carefully added dropwise acetone (30 ml) at 0° C. and then the solvent was evaporated in vacuo. To the resultant residue were added ethyl acetate (100 ml) and water (50 ml). The organic layer was separated, washed with brine (50 ml) and dried over magnesium sulfate. Evaporation of the solvent gave a residue, which was chromatographed on silica gel (500 ml) eluting with a mixture of dichloromethane and methanol (18:1 V/V) to give (2S,4R)-1-benzyloxycarbonyl-2-[{3-(ethoxycarbonyl)-2-hydroxypropyl}oxymethyl]-4-methanesulfonyloxypyrrolidine (5.1 g).

Aufarbeitung

  1. customthe solvent was evaporated in vacuo
  2. additionTo the resultant residue were added ethyl acetate (100 ml) and water (50 ml)
  3. customThe organic layer was separated
  4. washwashed with brine (50 ml)
  5. dry with materialdried over magnesium sulfate
  6. customEvaporation of the solvent
  7. customgave a residue, which
  8. customwas chromatographed on silica gel (500 ml)
  9. washeluting with a mixture of dichloromethane and methanol (18:1 V/V)

Quellen und Nachweise

ORD-Eintrag
ord-ad666784a6034ea898464939a7fe73bc
Quelldatensatz
uspto-grants-1991_01
Patentnummer
US04983596

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