Triphenylphosphine → (2R,4S)-4-acetylthio-1-t-butoxycarbonyl-2-(N-t-butoxycarbonyl-N-sulfamoylamino)methylpyrrolidine

HRID 1034510Notes

Reaction equation

HRID 1034510 reaction equation
S(N)(N)(=O)=O.[C:6]([S:9][C@@H:10]1[CH2:14][N:13]([C:15]([O:17][C:18]([CH3:21])([CH3:20])[CH3:19])=[O:16])[C@@H:12]([CH2:22]O)[CH2:11]1)(=[O:8])[CH3:7].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[C:43]([O:47][C:48]([NH:50][S:51]([NH2:54])(=[O:53])=[O:52])=[O:49])([CH3:46])([CH3:45])[CH3:44].C(OC(N=NC(OCC)=O)=O)C>O1CCCC1.C1(C)C=CC=CC=1>[C:6]([S:9][C@@H:10]1[CH2:14][N:13]([C:15]([O:17][C:18]([CH3:19])([CH3:20])[CH3:21])=[O:16])[C@@H:12]([CH2:22][N:50]([C:48]([O:47][C:43]([CH3:46])([CH3:45])[CH3:44])=[O:49])[S:51](=[O:52])(=[O:53])[NH2:54])[CH2:11]1)(=[O:8])[CH3:7]

Participants

8

Reactant 5

HCID 11776TriphenylphosphineHCID 82267SulfamideHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 107265421,1-Dimethylethyl N-(aminosulfonyl)carbamateHCID 57080293tert-Butyl (2R,4S)-4-(acetylsulfanyl)-2-(hydroxymethyl)pyrrolidine-1-carboxylate

Product 1

HCID 57156698(2R,4S)-4-acetylthio-1-t-butoxycarbonyl-2-(N-t-butoxycarbonyl-N-sulfamoylamino)methylpyrrolidine

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8028TetrahydrofuranSolvent

Procedure

Preparation of a sulfamide compound To a solution of (2R,4S)-4-acetylthio-1-t-butoxycarbonylpyrrolidine-2-methanol (i.e., a substrate) in tetrahydrofuran (THF), triphenylphosphine (PPh3), N-t-butoxycarbonylsulfamide (BSMD), and azodicarboxylic acid diethyl ester (DEAD) are successively added under ice cooling. The conditions for this reaction are shown in Table 2, Step A-6. The reaction mixture is diluted with toluene, concentrated, diluted with toluene, and the formed crystals are filtered off. The filtrate is concentrated. The residue is purified by silica gel column chromatography to give (2R,4S)-4-acetylthio-1-t-butoxycarbonyl-2-(N-t-butoxycarbonyl-N-sulfamoylamino)methylpyrrolidine. NMR δ(CDCl3) ppm: 1.41(s, 9H), 1.55(s, 9H), 1.19 to 2.0(m, 2H), 2.35(s, 3H), 3.32(dd, J=11.4 Hz, J=8.2 Hz, 1H), 3.6 to 3.9(m, 3H), 3.9 to 4.1(m, 1H), 4.5(m, 1H), 6.15(s, 2H). IR ν (KBr) cm-1 : 3420, 3320, 1706, 1686, 1666.

Workup

  1. concentrationconcentrated
  2. additiondiluted with toluene
  3. filtrationthe formed crystals are filtered off
  4. concentrationThe filtrate is concentrated
  5. customThe residue is purified by silica gel column chromatography

Sources & evidence

ORD record
ord-9230b6033b8e4896b06467b63b36f1fb
Source dataset
uspto-grants-1994_05
Patent number
US05317016

Reaction notes

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