Ethanol → HCID 22242839, compound

HRID 891590Notes

Reaction equation

HRID 891590 reaction equation
[C:1]([N:4]1[CH2:7][CH:6]([OH:8])[CH2:5]1)(=[O:3])[NH2:2].[Si:9](Cl)([C:22]([CH3:25])([CH3:24])[CH3:23])([C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1.N1C=CN=C1.C(O)C>CN(C)C=O>[Si:9]([O:8][CH:6]1[CH2:7][N:4]([C:1](=[O:3])[NH2:2])[CH2:5]1)([C:22]([CH3:25])([CH3:24])[CH3:23])([C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1)[C:10]1[CH:15]=[CH:14][CH:13]=[CH:12][CH:11]=1

Participants

6

Reactant 4

HCID 702EthanolHCID 795ImidazoleHCID 94078tert-ButyldiphenylchlorosilaneHCID 22243070429668-21-3

Product 1

HCID 22242839HCID 22242839, compoundYield 18%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 1-carbamoyl-3-hydroxyazetidine (obtained as described in Reference Example 21(1)) in dimethylformamide (100 ml) were added t-butyldiphenylsilyl chloride (18.0 ml, 66.9 mmol) and imidazole (4.55 g, 66.9 mmol) in an ice bath. After stirring the mixture in an ice bath for 10 minutes, the resulting mixture was stirred at room temperature overnight. After checking the completion of the reaction, ethanol (1 ml) was added to the reaction mixture in an ice bath and the resulting mixture was stirred at room temperature for 30 minutes. The reaction mixture was partitioned between ethyl acetate and aqueous sodium hydrogencarbonate solution. The organic layer was washed with saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, filtered and concentrated under reduced pressure. The residue was purified by chromatography on a silica gel column using ethyl acetate:methanol (10:1) as the eluant to afford 3-t-butyldiphenylsilyloxy-1-carbamoylazetidine (1.45 g, total yield 18%) as a white solid.

Workup

  1. stirringthe resulting mixture was stirred at room temperature overnight
  2. additionwas added to the reaction mixture in an ice bath
  3. stirringthe resulting mixture was stirred at room temperature for 30 minutes
  4. customThe reaction mixture was partitioned between ethyl acetate and aqueous sodium hydrogencarbonate solution
  5. washThe organic layer was washed with saturated aqueous sodium chloride solution
  6. dry with materialdried over anhydrous magnesium sulfate
  7. filtrationfiltered
  8. concentrationconcentrated under reduced pressure
  9. customThe residue was purified by chromatography on a silica gel column

Sources & evidence

ORD record
ord-041316a3a1a14f9986a0268e37d630b0
Source dataset
uspto-grants-2006_02
Patent number
US07001897B2

Reaction notes

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