Pyridine → 4-{(2S,3R)-2-({[(3R,3aS,6aR)-Hexahydrofuro[2,3-b]furan-3-yloxy]carbonyl)amino)-4-[(1,3-benzodioxol-5-ylsulfonyl)(isobutyl)amino]-3-hydroxybutyl}phenyl 4-nitrophenyl carbonate

HRID 1815561Notes

Reaction equation

HRID 1815561 reaction equation
[O:1]1[C:5]2[CH:6]=[CH:7][C:8]([S:10]([N:13]([CH2:38][CH:39]([CH3:41])[CH3:40])[CH2:14][C@@H:15]([OH:37])[C@@H:16]([NH:25][C:26](=[O:36])[O:27][C@@H:28]3[C@H:35]4[C@H:31]([O:32][CH2:33][CH2:34]4)[O:30][CH2:29]3)[CH2:17][C:18]3[CH:23]=[CH:22][C:21]([OH:24])=[CH:20][CH:19]=3)(=[O:12])=[O:11])=[CH:9][C:4]=2[O:3][CH2:2]1.N1C=CC=CC=1.Cl[C:49]([O:51][C:52]1[CH:57]=[CH:56][C:55]([N+:58]([O-:60])=[O:59])=[CH:54][CH:53]=1)=[O:50]>ClCCl>[C:49](=[O:50])([O:51][C:52]1[CH:53]=[CH:54][C:55]([N+:58]([O-:60])=[O:59])=[CH:56][CH:57]=1)[O:24][C:21]1[CH:22]=[CH:23][C:18]([CH2:17][C@H:16]([NH:25][C:26]([O:27][C@@H:28]2[C@H:35]3[C@H:31]([O:32][CH2:33][CH2:34]3)[O:30][CH2:29]2)=[O:36])[C@H:15]([OH:37])[CH2:14][N:13]([S:10]([C:8]2[CH:7]=[CH:6][C:5]3[O:1][CH2:2][O:3][C:4]=3[CH:9]=2)(=[O:12])=[O:11])[CH2:38][CH:39]([CH3:41])[CH3:40])=[CH:19][CH:20]=1

Participants

5

Reactant 3

HCID 1049PyridineHCID 821294-Nitrophenyl chloroformateHCID 59997191(3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-3-[(1,3-benzodioxol-5-ylsulfonyl) (isobutyl)amino]-2-hydroxy-1-(4-hydroxybenzyl)propylcarbamate

Product 1

HCID 599972454-{(2S,3R)-2-({[(3R,3aS,6aR)-Hexahydrofuro[2,3-b]furan-3-yloxy]carbonyl)amino)-4-[(1,3-benzodioxol-5-ylsulfonyl)(isobutyl)amino]-3-hydroxybutyl}phenyl 4-nitrophenyl carbonate

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of (3R,3aS,6aR)-hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-3-[(1,3-benzodioxol-5-ylsulfonyl)(isobutyl)amino]-2-hydroxy-1-(4-hydroxybenzyl)propylcarbamate (0.5 g, 0.84 mmol) in dichloromethane (4 mL) at 0° C. was added pyridine (0.16 mL, 0.158 g, 2.0 mmol) and 4-nitrophenyl chloroformate (0.22 g, 1.09 mmol) and the mixture was stirred at ambient temperature for 1 h. Dichloromethane was added and the mixture was washed with 15% citric acid/water (2×), saturated sodium bicarbonate/water, dried (sodium sulfate), evaporated, and purified by chromatography (silica gel, dichloromethane/methanol, 49:1) to provide the title compound as a solid foam (0.5 g, 79% yield). 1H NMR (DMSO-d6): δ 0.78 (3H, d), 0.82 (3H, d), 1.16 (1H, dd), 1.3-1.4 (1H, m), 1.9-2.0 (1H, m), 2.42 (1H, t), 2.65-2.80 (3H, m), 3.0 (2H, dd), 3.3-3.4 (1H, m), 3.5-3.6 (4H, m), 3.7 (1H, t), 3.8 (1H, dd), 4.8 (1H, dt), 5.1 (1H, d), 5.5 (1H, d), 6.18 (2H, s), 7.05 (1H, d), 7.2-7.4 (7H, m), 7.7 (2H, d), 8.35 (2H, d)

Workup

  1. washthe mixture was washed with 15% citric acid/water (2×), saturated sodium bicarbonate/water
  2. dry with materialdried (sodium sulfate)
  3. customevaporated
  4. custompurified by chromatography (silica gel, dichloromethane/methanol, 49:1)

Sources & evidence

ORD record
ord-5e9192cd681e4d97933ba5c99797bae1
Source dataset
uspto-grants-2005_04
Patent number
US06878728B1

Reaction notes

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