Imidazole → Tert-butyl(3,5-dichlorophenoxy)dimethylsilane

HRID 2427461Notes

Reaction equation

HRID 2427461 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([OH:9])[CH:5]=[C:6]([Cl:8])[CH:7]=1.N1C=CN=C1.[C:15]([Si:19](Cl)([CH3:21])[CH3:20])([CH3:18])([CH3:17])[CH3:16].O>CN(C)C=O>[C:15]([Si:19]([O:9][C:4]1[CH:3]=[C:2]([Cl:1])[CH:7]=[C:6]([Cl:8])[CH:5]=1)([CH3:21])[CH3:20])([CH3:18])([CH3:17])[CH3:16]

Participants

6

Reactant 4

HCID 795ImidazoleHCID 962WaterHCID 115713,5-DichlorophenolHCID 28928tert-Butyldimethylsilyl chloride

Product 1

HCID 18007485Tert-butyl(3,5-dichlorophenoxy)dimethylsilane

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

Dissolve 3,5 dichlorophenol (1 kg, 6.13 mol) in 3 L dimethylformamide and cool to 0° C. Add imidazole (918.74 g, 6.75 mol), followed by tertbutyldimethylsilyl chloride (1017.13 g, 6.75 mol). Warm the mixture to room temperature and stir for 15 min. Pour into water (6 L) and extract with ether (4 L). Wash the organic layer with water 2 times, 10% aqueous lithium chloride solution then brine before drying over sodium sulfate. Filter and concentrate under vacuum to 135 g of an oil.

Workup

  1. temperatureWarm the mixture to room temperature
  2. extractionextract with ether (4 L)
  3. washWash the organic layer with water 2 times, 10% aqueous lithium chloride solution
  4. dry with materialbrine before drying over sodium sulfate
  5. filtrationFilter
  6. concentrationconcentrate under vacuum to 135 g of an oil

Sources & evidence

ORD record
ord-5dd79bbd086f443baf25bd34890e8359
Source dataset
uspto-grants-2011_06
Patent number
US07968585B2

Reaction notes

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