Imidazole → (2R)-[t-butyloxycarbonyl(4'-chlorobiphenyl-4-sulfonyl)amino]-4-iodobutyric acid t-butyl ester

HRID 2187983Notes

Reaction equation

HRID 2187983 reaction equation
[C:1]([O:5][C:6](=[O:35])[C@H:7]([N:11]([C:28]([O:30][C:31]([CH3:34])([CH3:33])[CH3:32])=[O:29])[S:12]([C:15]1[CH:20]=[CH:19][C:18]([C:21]2[CH:26]=[CH:25][C:24]([Cl:27])=[CH:23][CH:22]=2)=[CH:17][CH:16]=1)(=[O:14])=[O:13])[CH2:8][CH2:9]O)([CH3:4])([CH3:3])[CH3:2].[I:36]I.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N1C=CN=C1>ClCCl.CO>[C:1]([O:5][C:6](=[O:35])[C@H:7]([N:11]([C:28]([O:30][C:31]([CH3:34])([CH3:33])[CH3:32])=[O:29])[S:12]([C:15]1[CH:20]=[CH:19][C:18]([C:21]2[CH:26]=[CH:25][C:24]([Cl:27])=[CH:23][CH:22]=2)=[CH:17][CH:16]=1)(=[O:14])=[O:13])[CH2:8][CH2:9][I:36])([CH3:4])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 795ImidazoleHCID 807IodineHCID 11776TriphenylphosphineHCID 69287155(2R)-[t-butoxycarbonyl(4'-chlorobiphenyl-4-sulfonyl)amino]4-hydroxybutyric acid t-butyl ester

Product 1

HCID 53729423(2R)-[t-butyloxycarbonyl(4'-chlorobiphenyl-4-sulfonyl)amino]-4-iodobutyric acid t-butyl esterYield 78%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 6344DichloromethaneSolvent

Procedure

A solution of the title E compound, (2R)-[t-butoxycarbonyl(4′-chlorobiphenyl-4-sulfonyl)amino]4-hydroxybutyric acid t-butyl ester (2.0 g, 9.58 mmol) in 50 mL dichloromethane is sequentially treated with iodine (2.88 g, 14.37 mmol), triphenylphosphine (3.72 g, 14.37 mmol) and imidazole (0.97 g, 14.37 mmol) at RT. After 2 h, 20 mL of methanol are added and the reaction mixture is stirred at RT for 30 min further. The solvent is evaporated and the product is purified by chomatography on silica gel (eluant; 1/19—EtOAc/hexane) to afford 2.46 g (78%) of (2R)-[t-butyloxycarbonyl(4′-chlorobiphenyl-4-sulfonyl)amino]-4-iodobutyric acid t-butyl ester.

Workup

  1. customThe solvent is evaporated
  2. customthe product is purified by chomatography on silica gel (eluant; 1/19—EtOAc/hexane)

Sources & evidence

ORD record
ord-a9295c6605854836a6d4bccee25fa519
Source dataset
uspto-grants-2002_06
Patent number
US06410580B1

Reaction notes

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