Imidazole → HCID 22058631, compound

HRID 1699904Notes

Reaction equation

HRID 1699904 reaction equation
[Br:1][C:2]1[CH:9]=[CH:8][C:5]([CH2:6][OH:7])=[C:4]([Cl:10])[CH:3]=1.N1C=CN=C1.[C:16]([Si:20](Cl)([C:27]1[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)([CH3:19])([CH3:18])[CH3:17].O>CN(C)C=O>[Br:1][C:2]1[CH:9]=[CH:8][C:5]([CH2:6][O:7][Si:20]([C:16]([CH3:19])([CH3:18])[CH3:17])([C:27]2[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=2)[C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=2)=[C:4]([Cl:10])[CH:3]=1

Participants

6

Reactant 4

HCID 795ImidazoleHCID 962WaterHCID 94078tert-ButyldiphenylchlorosilaneHCID 43805739(4-Bromo-2-chlorophenyl)methanol

Product 1

HCID 22058631HCID 22058631, compoundYield 97.2%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of 4-bromo-2-chlorobenzyl alcohol (14.48 g) in N,N-dimethylformamide (72 ml) were added imidazole (5.34 g) and tert-butylchlorodiphenylsilane (19.8 g) under ice-cooling and the mixture was stirred for 1 hr. Water was added to the reaction mixture and the resulting product was extracted twice with hexane. The organic layers were combined, and washed successively with water, a saturated aqueous solution of sodium hydrogencarbonate and saturated brine and dried over anhydrous magnesium sulfate. The solvent was evaporated and the residue was subjected to silica gel column chromatography (hexane) to give the objective compound (29.22 g) as colorless oil.

Workup

  1. temperaturecooling
  2. extractionthe resulting product was extracted twice with hexane
  3. washwashed successively with water
  4. dry with materiala saturated aqueous solution of sodium hydrogencarbonate and saturated brine and dried over anhydrous magnesium sulfate
  5. customThe solvent was evaporated

Sources & evidence

ORD record
ord-b11e85dccaa14591ae285c3f2ae5b7ef
Source dataset
uspto-grants-2002_02
Patent number
US06348474B1

Reaction notes

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