Imidazole → (3-Bromo-5-fluorophenoxy)(tert-butyl)diphenylsilane

HRID 1874180Notes

Reaction equation

HRID 1874180 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([OH:9])[CH:5]=[C:6]([F:8])[CH:7]=1.N1C=CN=C1.[C:15]([Si:19](Cl)([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)([CH3:18])([CH3:17])[CH3:16]>C1COCC1>[Br:1][C:2]1[CH:3]=[C:4]([CH:5]=[C:6]([F:8])[CH:7]=1)[O:9][Si:19]([C:15]([CH3:18])([CH3:17])[CH3:16])([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

Participants

5

Reactant 3

HCID 795ImidazoleHCID 94078tert-ButyldiphenylchlorosilaneHCID 219046363-Bromo-5-fluorophenol

Product 1

HCID 59458554(3-Bromo-5-fluorophenoxy)(tert-butyl)diphenylsilaneYield 58%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To a solution of 3-bromo-5-fluorophenol (5.7 g, 30 mmol), prepared as described in Procedure 3, and imidazole (4.0 g, 60 mmol, 2 eq) in anhydrous THF (100 mL) at 0° C. was added tert-butyldiphenyl-silyl chloride (9.6 mL, 1.3 eq). The resulting mixture was stirred at room temperature for 18 h. The reaction mixture was quenched with water and extracted with hexane/EtOAc (1:1). The combined organic layers were washed with H2O (2×) and sat. NaCl (2×), dried over Na2SO4, filtered and concentrated under reduced pressure. The resulting residue was purified by silica gel chromatography (hexanes/EtOAc) to give (3-bromo-5-fluorophenoxy)(tert-butyl)diphenylsilane as colorless oil (7.5 g, yield 58%).

Workup

  1. customThe reaction mixture was quenched with water
  2. extractionextracted with hexane/EtOAc (1:1)
  3. washThe combined organic layers were washed with H2O (2×) and sat. NaCl (2×)
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe resulting residue was purified by silica gel chromatography (hexanes/EtOAc)

Sources & evidence

ORD record
ord-fe69990671e74d348643bf4b28262a1f
Source dataset
uspto-grants-2012_11
Patent number
US08304403B2

Reaction notes

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