2-Mercaptoethanol → (2S,4S)-2-[(2S)-2-carbamoylpyrrolidin-1-yl]methyl-4-mercapto-1-(4-nitrobenzyloxycarbonyl)pyrrolidine

HRID 1590480Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1590480
[C:1]([C@@H:4]1[CH2:8][CH2:7][CH2:6][N:5]1[CH2:9][C@@H:10]1[CH2:14][C@H:13]([S:15]C(C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[CH2:12][N:11]1[C:35]([O:37][CH2:38][C:39]1[CH:44]=[CH:43][C:42]([N+:45]([O-:47])=[O:46])=[CH:41][CH:40]=1)=[O:36])(=[O:3])[NH2:2].SCCO>FC(F)(F)C(O)=O.C1(C)C=CC=CC=1>[C:1]([C@@H:4]1[CH2:8][CH2:7][CH2:6][N:5]1[CH2:9][C@@H:10]1[CH2:14][C@H:13]([SH:15])[CH2:12][N:11]1[C:35]([O:37][CH2:38][C:39]1[CH:40]=[CH:41][C:42]([N+:45]([O-:47])=[O:46])=[CH:43][CH:44]=1)=[O:36])(=[O:3])[NH2:2]

Komponenten

5

Edukt 2

HCID 15672-MercaptoethanolHCID 15056121(2S,4S)-2-[(2S)-2-carbamoylpyrrolidin-1-yl]methyl-1-(4-nitrobenzyloxycarbonyl)-4-(triphenylmethylthio)pyrrolidine

Produkt 1

HCID 57065684(2S,4S)-2-[(2S)-2-carbamoylpyrrolidin-1-yl]methyl-4-mercapto-1-(4-nitrobenzyloxycarbonyl)pyrrolidineAusbeute 52,5 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 1140TolueneLösungsmittelHCID 6422Trifluoroacetic acidLösungsmittel

Versuchsvorschrift

To a solution of (2S,4S)-2-[(2S)-2-carbamoylpyrrolidin-1-yl]methyl-1-(4-nitrobenzyloxycarbonyl)-4-(triphenylmethylthio)pyrrolidine (1.76 g) in trifluoroacetic acid (10 ml) was added 2-mercaptoethanol (0.38 ml) under ice-cooling and the mixture was stirred at ambient temperature for 15 minutes. The reaction mixture was concentrated under reduced pressure to give a residue. The residue was dissolved in toluene (10 ml) and the solution was evaporated in vacuo. The resulting residue was dissolved in ethyl acetate (50 ml), washed successively with saturated aqueous sodium hydrogen carbonate (20 ml) and saturated aqueous sodium chloride, dried over anhydrous magnesium sulfate, and evaporated in vacuo to give a residue. The residue was chromatographed on silica gel (100 g) eluting with a mixture of dichloromethane and acetone (9:1 V/V). The fractions containing the desired compound were collected and evaporated in vacuo to give (2S,4S)-2-[(2S)-2-carbamoylpyrrolidin-1-yl]methyl-4-mercapto-1-(4-nitrobenzyloxycarbonyl)-pyrrolidine (0.58 g).

Aufarbeitung

  1. temperaturecooling
  2. concentrationThe reaction mixture was concentrated under reduced pressure
  3. customto give a residue
  4. customthe solution was evaporated in vacuo
  5. dissolutionThe resulting residue was dissolved in ethyl acetate (50 ml)
  6. washwashed successively with saturated aqueous sodium hydrogen carbonate (20 ml) and saturated aqueous sodium chloride
  7. dry with materialdried over anhydrous magnesium sulfate
  8. customevaporated in vacuo
  9. customto give a residue
  10. customThe residue was chromatographed on silica gel (100 g)
  11. washeluting with a mixture of dichloromethane and acetone (9:1 V/V)
  12. additionThe fractions containing the desired compound
  13. customwere collected
  14. customevaporated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-43cb9dfa956048e6b0fb44ab92f4b3d8
Quelldatensatz
uspto-grants-1993_04
Patentnummer
US05202437

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