Triethylamine → (2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-[2-(4-nitrobenzyloxycarbonylamino)ethyloxymethyl]pyrrolidine

HRID 346369Notes

Reaction equation

HRID 346369 reaction equation
[OH:1][C@H:2]1[CH2:6][N:5]([C:7]([O:9][CH2:10][C:11]2[CH:16]=[CH:15][C:14]([N+:17]([O-:19])=[O:18])=[CH:13][CH:12]=2)=[O:8])[C@H:4]([CH2:20][O:21][CH2:22][CH2:23][NH:24][C:25]([O:27][CH2:28][C:29]2[CH:34]=[CH:33][C:32]([N+:35]([O-:37])=[O:36])=[CH:31][CH:30]=2)=[O:26])[CH2:3]1.C(N(CC)CC)C.[CH3:45][S:46](Cl)(=[O:48])=[O:47]>O1CCCC1.ClCCl>[CH3:45][S:46]([O:1][C@H:2]1[CH2:6][N:5]([C:7]([O:9][CH2:10][C:11]2[CH:12]=[CH:13][C:14]([N+:17]([O-:19])=[O:18])=[CH:15][CH:16]=2)=[O:8])[C@H:4]([CH2:20][O:21][CH2:22][CH2:23][NH:24][C:25]([O:27][CH2:28][C:29]2[CH:34]=[CH:33][C:32]([N+:35]([O-:37])=[O:36])=[CH:31][CH:30]=2)=[O:26])[CH2:3]1)(=[O:48])=[O:47]

Participants

6

Reactant 3

HCID 8471TriethylamineHCID 31297Methanesulfonyl chlorideHCID 18641554(2S,4R)-4-hydroxy-1-(4-nitrobenzyloxycarbonyl)-2-[2-(4-nitrobenzyloxycarbonylamino)ethyloxymethyl]pyrrolidine

Product 1

HCID 57206022(2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)-2-[2-(4-nitrobenzyloxycarbonylamino)ethyloxymethyl]pyrrolidine

Reagents, catalysts & solvents 2

HCID 6344DichloromethaneSolvent2×HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of (2S,4R)-4-hydroxy-1-(4-nitrobenzyloxycarbonyl)-2-[2-(4-nitrobenzyloxycarbonylamino)ethyloxymethyl]pyrrolidine (0.87 g) and triethylamine (0.35 ml) in a mixture of tetrahydrofuran (5 ml) and dichloromethane (10 ml) was dropwise added a solution of methanesulfonyl chloride (0.16 ml) in dichloromethane (2 ml) with stirring at 0°-5° C. and the mixture was stirred at 0°-5° C. for 30 minutes. The reaction mixture was washed with water (20 ml), dried over magnesium sulfate and concentrated under reduced pressure to give a syrup. The syrup was subjected to a column chromatography on silica gel (20 g) and eluted with a mixture of methanol and chloroform (1:99 V/V) to give (2S,4R)-4-methanesulfonyloxy-1-(4-nitrobenzyloxycarbonyl)2-[2-(4-nitrobenzyloxycarbonylamino)ethyloxymethyl]pyrrolidine (0.92 g).

Workup

  1. stirringthe mixture was stirred at 0°-5° C. for 30 minutes
  2. washThe reaction mixture was washed with water (20 ml)
  3. dry with materialdried over magnesium sulfate
  4. concentrationconcentrated under reduced pressure
  5. customto give a syrup
  6. washeluted with a mixture of methanol and chloroform (1:99 V/V)

Sources & evidence

ORD record
ord-a5940c27fd114232bd4faded7d447afe
Source dataset
uspto-grants-1991_10
Patent number
US05061804

Reaction notes

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