Iodoethane → HCID 69693476, compound

HRID 967814Notes

Reaction equation

HRID 967814 reaction equation
[Si:1]([O:8][CH2:9][CH2:10][C:11]1[CH:16]=[CH:15][C:14]([N:17]2[CH:21]=[C:20]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)[N:19]=[CH:18]2)=[CH:13][CH:12]=1)([C:4]([CH3:7])([CH3:6])[CH3:5])([CH3:3])[CH3:2].[Li][CH2:29][CH2:30]CC.CCCCCC.C(I)C>O1CCCC1.O>[Si:1]([O:8][CH2:9][CH2:10][C:11]1[CH:16]=[CH:15][C:14]([N:17]2[CH:21]=[C:20]([C:22]3[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=3)[N:19]=[C:18]2[CH2:29][CH3:30])=[CH:13][CH:12]=1)([C:4]([CH3:7])([CH3:5])[CH3:6])([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 6340IodoethaneHCID 8058HexaneHCID 69693088HCID 69693088, compoundHCID 178418339Butyllithium

Product 1

HCID 69693476HCID 69693476, compoundYield 92%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent2×

Procedure

To a stirred solution of 1-[4-(2-{[tert-butyl(dimethyl)silyl]oxy}ethyl)phenyl]-4-phenyl-1H-imidazole (1.89 g, 5.0 mmol) in tetrahydrofuran (40 mL) was added a solution of 1.5 M n-BuLi in hexane (3.5 mL, 5.5 mmol) at −78° C. over 10 min. After 30 min, a solution of ethyl iodide (2.0 mL, 25.0 mmol) in tetrahydrofuran (10 mL) was added slowly to the mixture at −78° C. The resultant mixture was warmed to room temperature and stirred for 2 h. To the reaction mixture was added water and the volatile components were removed under reduced pressure. The aqueous phase was extracted with ethyl acetate and the combined organic phase was dried (MgSO4) and concentrated under reduced pressure. Purification by flash column chromatography on silica gel eluting with hexane/ethyl acetate (gradient elution from 10:1 to 6:1) to afford 1.86 g (92%) of the title compound as pale yellow oil: MS (ESI) m/z 379 [M+H]+1H-NMR (CDCl3)δ0.00 (6H, s), 0.88 (9H, s), 1.26 (3H, t, J=7.5 Hz), 2.73 (2H, q, J=7.5 Hz), 2.91 (2H, t, J=6.6 Hz), 3.89 (2H, t, J=6.6 Hz), 7.22-7.28 (4H, m), 7.33-7.41 (4H, m), 7.81 (2H, d, J=7.1 Hz).

Workup

  1. customthe volatile components were removed under reduced pressure
  2. extractionThe aqueous phase was extracted with ethyl acetate
  3. dry with materialthe combined organic phase was dried (MgSO4)
  4. concentrationconcentrated under reduced pressure
  5. customPurification by flash column chromatography on silica gel eluting with hexane/ethyl acetate (gradient elution from 10:1 to 6:1)

Sources & evidence

ORD record
ord-30c91e3de2dd4b73a9d6b7d4823b8598
Source dataset
uspto-grants-2005_10
Patent number
US06956050B2

Reaction notes

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