Sodium hydride → (2R,3S)-tert-butyl 2-((tert-butyldimethylsilyloxy)methyl)-3-(3-fluoro-5-nitrophenoxy)pyrrolidine-1-carboxylate

HRID 604858Notes

Reaction equation

HRID 604858 reaction equation
[Si:1]([O:8][CH2:9][C@@H:10]1[C@@H:14]([OH:15])[CH2:13][CH2:12][N:11]1[C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[H-].[Na+].[F:25][C:26]1[CH:27]=[C:28]([N+:33]([O-:35])=[O:34])[CH:29]=[C:30](F)[CH:31]=1>CN(C=O)C>[Si:1]([O:8][CH2:9][C@@H:10]1[C@@H:14]([O:15][C:30]2[CH:29]=[C:28]([N+:33]([O-:35])=[O:34])[CH:27]=[C:26]([F:25])[CH:31]=2)[CH2:13][CH2:12][N:11]1[C:16]([O:18][C:19]([CH3:22])([CH3:21])[CH3:20])=[O:17])([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2]

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 752721,3-Difluoro-5-nitrobenzeneHCID 14462925HCID 14462925, compound

Product 1

HCID 57683630(2R,3S)-tert-butyl 2-((tert-butyldimethylsilyloxy)methyl)-3-(3-fluoro-5-nitrophenoxy)pyrrolidine-1-carboxylateYield 82%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a 0° C. solution of (2R,3S)-tert-butyl 2-((tert-butyldimethylsilyloxy)methyl)-3-hydroxypyrrolidine-1-carboxylate (1 equiv) in DMF (0.5 M) was added NaH (1.3 equiv) as a solid. After stirring for 15 min at 0° C., 3,5-difluoronitrobenzene (1.2 equiv) was added by syringe. The reaction mixture was allowed to warm to room temperature and stirred for 2 h. The reaction was quenched by the addition of water, and the mixture was diluted with EtOAc. The organic layer was washed four times with water and once with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Purification by flash chromatography (0-20% EtOAc/Hexanes) provided the title compound in 82% yield.

Workup

  1. temperatureto warm to room temperature
  2. stirringstirred for 2 h
  3. customThe reaction was quenched by the addition of water
  4. additionthe mixture was diluted with EtOAc
  5. washThe organic layer was washed four times with water
  6. dry with materialonce with brine, dried over anhydrous sodium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customPurification by flash chromatography (0-20% EtOAc/Hexanes)

Sources & evidence

ORD record
ord-687765758f3b44098917ffa13c443f85
Source dataset
uspto-grants-2011_03
Patent number
US07910743B2

Reaction notes

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