Methyl iodide → HCID 21877302, compound

HRID 724407Notes

Reaction equation

HRID 724407 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][CH2:9][O:10][CH2:11][CH2:12][Si:13]([CH3:16])([CH3:15])[CH3:14])=[CH:4][C:3]=1[CH2:17][CH2:18][OH:19].[OH-].[K+].I[CH3:23]>CS(C)=O.O>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][CH2:9][O:10][CH2:11][CH2:12][Si:13]([CH3:14])([CH3:16])[CH3:15])=[CH:4][C:3]=1[CH2:17][CH2:18][O:19][CH3:23]

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 14797Potassium HydroxideHCID 21877550HCID 21877550, compound

Product 1

HCID 21877302HCID 21877302, compoundYield 59%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 962WaterSolvent

Procedure

2-[2-Bromo-5-(2-trimethylsilanyl-ethoxymethoxy)-phenyl]-ethanol (1.9 g, 6.0 mmol) was added to a solution of potassium hydroxide (1.35 g, 24 mmol) in DMSO (16 mL). Iodomethane (1.12 mL, 18 mmol) was added, and the solution stirred for 16 h. The reaction was diluted with water (50 mL) and extracted with ether (2×40 mL). Organics were washed with brine (40 mL), dried (Na2SO4) and concentrated in vacuo. Purification by silica gel chromatography (10% ether/hexanes) gave 1.28 g of {2-[4-bromo-3-(2-methoxy-ethyl)-phenoxymethoxy]-ethyl}-trimethyl-silane as a clear oil. 1H NMR (300 MHz, CDCl3) δ 7.40 (d, 1H, J=8.7 Hz), 6.96 (d, 1H, J=3.0 Hz), 6.80 (dd, 1H, J=8.7, 3.0 Hz), 5.18 (s, 2H), 3.74 (t, 2H, J=8.4 Hz), 3.60 (t, 2H, J=7.2 Hz), 3.37 (s, 3H), 2.98 (t, 2H, J=7.2 Hz), 0.95 (t, 2H, J=8.4 Hz), −0.01 (s, 9H).

Workup

  1. extractionextracted with ether (2×40 mL)
  2. washOrganics were washed with brine (40 mL)
  3. dry with materialdried (Na2SO4)
  4. concentrationconcentrated in vacuo
  5. customPurification by silica gel chromatography (10% ether/hexanes)

Sources & evidence

ORD record
ord-10cbaae2be034464b28b7ea1abad990b
Source dataset
uspto-grants-2006_11
Patent number
US07141587B2

Reaction notes

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