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

HRID 1650848Notes

Reaction equation

HRID 1650848 reaction equation
[OH:1][CH2:2][C@@H:3]1[CH2:7][CH2:6][CH2:5][N:4]1[CH2:8][C@@H:9]1[CH2:13][C@H:12]([S:14]C(C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[CH2:11][N:10]1[C:34]([O:36][CH2:37][C:38]1[CH:43]=[CH:42][C:41]([N+:44]([O-:46])=[O:45])=[CH:40][CH:39]=1)=[O:35].SCCO>FC(F)(F)C(O)=O.C(OCC)(=O)C>[OH:1][CH2:2][C@@H:3]1[CH2:7][CH2:6][CH2:5][N:4]1[CH2:8][C@@H:9]1[CH2:13][C@H:12]([SH:14])[CH2:11][N:10]1[C:34]([O:36][CH2:37][C:38]1[CH:39]=[CH:40][C:41]([N+:44]([O-:46])=[O:45])=[CH:42][CH:43]=1)=[O:35]

Participants

5

Reactant 2

HCID 15672-MercaptoethanolHCID 15056147(2S,4S)-2-[(2S)-2-(hydroxymethyl)-pyrrolidin-1-yl]methyl-1-(4-nitrobenzyloxycarbonyl)-4-(triphenylmethylthio)pyrrolidine

Product 1

HCID 15056150(2S,4S)-2-[(2S)-2-(hydroxymethyl)pyrrolidin-1-yl]methyl-4-mercapto-1-(4-nitrobenzyloxycarbonyl)pyrrolidineYield 49.7%

Reagents, catalysts & solvents 2

HCID 6422Trifluoroacetic acidSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of (2S,4S)-2-[(2S)-2-(hydroxymethyl)pyrrolidin-1-yl]methyl-1-(4-nitrobenzyloxycarbonyl)-4-(triphenylmethylthio)pyrrolidine (5.74 g) in trifluoroacetic acid (30 ml) was added 2-mercaptoethanol (0.95 ml) under ice-cooling and the mixture was stirred at ambient temperature for 15 minutes. The reaction mixture was evaporated in vacuo. The resulting residue was dissolved in toluene (30 ml) and the solution was evaporated in vacuo to give a residue. The residue was dissolved in ethyl acetate (100 ml) and the solution was washed in turn with saturated aqueous sodium hydrogen carbonate and aqueous sodium chloride, dried over magnesium sulfate and evaporated in vacuo. The resulting residue was chromatographed on silica gel (100 g) eluting with a mixture of chloroform and methanol (9:l,V/V). The fractions containing the desired compound were collected and evaporated in vacuo to give (2S,4S)-2-[(2S)-2-(hydroxymethyl)pyrrolidin-1-yl]methyl-4-mercapto-1-(4-nitrobenzyloxycarbonyl)pyrrolidine (1.77 g).

Workup

  1. temperaturecooling
  2. customThe reaction mixture was evaporated in vacuo
  3. dissolutionThe resulting residue was dissolved in toluene (30 ml)
  4. customthe solution was evaporated in vacuo
  5. customto give a residue
  6. washthe solution was washed in turn with saturated aqueous sodium hydrogen carbonate and aqueous sodium chloride
  7. dry with materialdried over magnesium sulfate
  8. customevaporated in vacuo
  9. customThe resulting residue was chromatographed on silica gel (100 g)
  10. washeluting with a mixture of chloroform and methanol (9:l,V/V)
  11. additionThe fractions containing the desired compound
  12. customwere collected
  13. customevaporated in vacuo

Sources & evidence

ORD record
ord-60ae3a55d30f4fa8b390ecaa18eccd2b
Source dataset
uspto-grants-1990_05
Patent number
US04925838

Reaction notes

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