Hydrochloric Acid → benzyl (2R, 4R)-2-(4,5-diphenyloxazol-2-yl)-4-methoxypyrrolidine-1-carboxylate

HRID 431760Notes

Reaction equation

HRID 431760 reaction equation
[C:1]1([C:7]2[N:8]=[C:9]([C@H:18]3[CH2:22][C@@H:21]([OH:23])[CH2:20][N:19]3[C:24]([O:26][CH2:27][C:28]3[CH:33]=[CH:32][CH:31]=[CH:30][CH:29]=3)=[O:25])[O:10][C:11]=2[C:12]2[CH:17]=[CH:16][CH:15]=[CH:14][CH:13]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[CH3:34]I.[H-].[Na+].Cl>CN(C=O)C>[C:1]1([C:7]2[N:8]=[C:9]([C@H:18]3[CH2:22][C@@H:21]([O:23][CH3:34])[CH2:20][N:19]3[C:24]([O:26][CH2:27][C:28]3[CH:29]=[CH:30][CH:31]=[CH:32][CH:33]=3)=[O:25])[O:10][C:11]=2[C:12]2[CH:13]=[CH:14][CH:15]=[CH:16][CH:17]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 86759290benzyl (2R, 4R)-2-(4,5-diphenyloxazol-2-yl)-4-hydroxypyrrolidine-1-carboxylate

Product 1

HCID 86759293benzyl (2R, 4R)-2-(4,5-diphenyloxazol-2-yl)-4-methoxypyrrolidine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of benzyl (2R, 4R)-2-(4,5-diphenyloxazol-2-yl)-4-hydroxypyrrolidine-1-carboxylate (400 mg) and CH3I (0.57 mL) in DMF (5 mL) was added NaH (60% oil suspension, 48 mg) at 5° C. The mixture was stirred at the same temperature for 10 minutes, then stirred at room temperature for 30 minutes. The reaction mixture was poured into diluted HCl, and extracted with EtOAc. The organic layer was washed with water, saturated sodium hydrogen carbonate, water and brine, dried (MgSO4), and evaporated in vacuo. The residue was purified by silica gal column chromatography (hexane-EtOAc, 1:1 elution) to give benzyl (2R, 4R)-2-(4,5-diphenyloxazol-2-yl)-4-methoxypyrrolidine-1-carboxylate (402.9 mg).

Workup

  1. stirringstirred at room temperature for 30 minutes
  2. extractionextracted with EtOAc
  3. washThe organic layer was washed with water, saturated sodium hydrogen carbonate, water and brine
  4. dry with materialdried (MgSO4)
  5. customevaporated in vacuo
  6. customThe residue was purified by silica gal column chromatography (hexane-EtOAc, 1:1 elution)

Sources & evidence

ORD record
ord-1b61353a2a1d4208a93c460c40c7c014
Source dataset
uspto-grants-2003_12
Patent number
US06660759B1

Reaction notes

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