Imidazole → HCID 69543981, compound

HRID 891653Notes

Reaction equation

HRID 891653 reaction equation
[CH2:1]([O:8][C:9](=[O:18])[NH:10][C@H:11]([CH2:16][OH:17])[CH2:12][CH:13]([CH3:15])[CH3:14])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[Si:19](Cl)([C:32]([CH3:35])([CH3:34])[CH3:33])([C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1.N1C=CN=C1>CN(C)C=O>[CH2:1]([O:8][C:9](=[O:18])[NH:10][C@H:11]([CH2:16][O:17][Si:19]([C:32]([CH3:35])([CH3:34])[CH3:33])([C:26]1[CH:27]=[CH:28][CH:29]=[CH:30][CH:31]=1)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][CH:21]=1)[CH2:12][CH:13]([CH3:15])[CH3:14])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1

Participants

5

Reactant 3

HCID 795ImidazoleHCID 94078tert-ButyldiphenylchlorosilaneHCID 11107802HCID 11107802, compound

Product 1

HCID 69543981HCID 69543981, compoundYield 98%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

Subsequently, to a solution of [(1S)-1-(hydroxymethyl)-3-methylbutyl]carbamic acid benzyl ester (4.84 g, 19.3 mmol) in dimethylformamide (145 ml) were added t-butyldiphenylsilyl chloride (6.01 ml, 23.1 mmol) and imidazole (1.57 g, 23.1 mmol) in an ice bath, and then the mixture was stirred at room temperature for 8 hours. After checking the completion of the reaction, the reaction mixture was partitioned between ethyl acetate and 10% aqueous sodium chloride solution. The organic layer was washed successively with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution, dried over anhydrous sodium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using n-hexane:ethyl acetate (19:1→7:1) as the eluant to afford [(1S)-1-(t-butyldiphenylsilyloxymethyl)-3-methylbutyl]carbamic acid benzyl ester (9.22 g, yield 98%) as a colorless oil.

Workup

  1. customthe completion of the reaction
  2. customthe reaction mixture was partitioned between ethyl acetate and 10% aqueous sodium chloride solution
  3. washThe organic layer was washed successively with saturated aqueous sodium hydrogencarbonate solution and saturated aqueous sodium chloride solution
  4. dry with materialdried over anhydrous sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by chromatography on a silica gel column

Sources & evidence

ORD record
ord-44606264706b4297933e8803dd44d7b5
Source dataset
uspto-grants-2006_02
Patent number
US07001897B2

Reaction notes

Loading…