Triphenylphosphine → (2S,4S)-4-acetylthio-1-allyloxycarbonyl-2-(N-sulfamoyl-N-allyloxycarbonylamino)methylpyrrolidine

HRID 1941625Notes

Reaction equation

HRID 1941625 reaction equation
[C:1]([S:4][C@@H:5]1[CH2:9][N:8]([C:10]([O:12][CH2:13][CH:14]=[CH2:15])=[O:11])[C@H:7]([CH2:16]O)[CH2:6]1)(=[O:3])[CH3:2].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[CH2:37]([O:40][C:41]([NH:43][S:44]([NH2:47])(=[O:46])=[O:45])=[O:42])[CH:38]=[CH2:39].C(OC(N=NC(OCC)=O)=O)C>C(OCC)(=O)C.C1(C)C=CC=CC=1>[C:1]([S:4][C@@H:5]1[CH2:9][N:8]([C:10]([O:12][CH2:13][CH:14]=[CH2:15])=[O:11])[C@H:7]([CH2:16][N:43]([S:44](=[O:45])(=[O:46])[NH2:47])[C:41]([O:40][CH2:37][CH:38]=[CH2:39])=[O:42])[CH2:6]1)(=[O:3])[CH3:2]

Participants

7

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 19605053Allyl sulfamoylcarbamateHCID 228426921-Pyrrolidinecarboxylic acid, 4-(acetylthio)-2-(hydroxymethyl)-, 2-propen-1-yl ester, (2S,4S)-

Product 1

HCID 57143963(2S,4S)-4-acetylthio-1-allyloxycarbonyl-2-(N-sulfamoyl-N-allyloxycarbonylamino)methylpyrrolidineYield 100.6%

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a solution of (2S,4S)-4-acetylthio-1-allyloxycarbonylpyrrolidine-2-methanol (8.02 g: ca. 30 mmole) in ethyl acetate (83 ml) under ice cooling, triphenylphosphine (9.44 g: 13.6 mmole), N-allyloxycarbonylsulfamide (3.12 g: 15.9 mmole), and azodicarboxylic acid diethylester (5.67 ml: 36 mmole) are successively added. The mixture is stirred under ice cooling for 55 minutes and at room temperature for 4 hours. The reaction mixture is dissolved in toluene (60 ml), concentrated, diluted with toluene (60 ml), filtered to remove separating crystals, and the filtrate is concentrated. The residue is purified by silica gel chromatography to give (2S,4S)-4-acetylthio-1-allyloxycarbonyl-2-(N-sulfamoyl-N-allyloxycarbonylamino)methylpyrrolidine (6.74 g). Yield: 55%. Colorless oil.

Workup

  1. concentrationconcentrated
  2. additiondiluted with toluene (60 ml)
  3. filtrationfiltered
  4. customto remove
  5. customseparating crystals
  6. concentrationthe filtrate is concentrated
  7. customThe residue is purified by silica gel chromatography

Sources & evidence

ORD record
ord-1f684ccb0d414679946aeeb430a96286
Source dataset
uspto-grants-1997_12
Patent number
US05703243

Reaction notes

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