2-Chloroethanol → 2-[4-(1H-imidazol-1-yl)phenoxy]ethanol

HRID 327731Notes

Reaction equation

HRID 327731 reaction equation
[N:1]1([C:6]2[CH:11]=[CH:10][C:9]([OH:12])=[CH:8][CH:7]=2)[CH:5]=[CH:4][N:3]=[CH:2]1.Cl[CH2:14][CH2:15][OH:16].C(=O)([O-])[O-].[K+].[K+]>C(C(C)=O)C>[N:1]1([C:6]2[CH:11]=[CH:10][C:9]([O:12][CH2:14][CH2:15][OH:16])=[CH:8][CH:7]=2)[CH:5]=[CH:4][N:3]=[CH:2]1

Participants

5

Reactant 3

HCID 342-ChloroethanolHCID 11430Potassium CarbonateHCID 823151-(p-Hydroxyphenyl)imidazole

Product 1

HCID 100816222-[4-(1H-imidazol-1-yl)phenoxy]ethanolYield 50%

Reagents, catalysts & solvents 1

HCID 6569Methyl Ethyl KetoneSolvent

Procedure

A stirred mixture of 8.0 g (0.050 mole) of 4(1H-imidazol-1-yl)phenol, 13.5 ml (0.20 mole) of 2-chloroethanol and 28 g (0.2 mole) of potassium carbonate in 200 ml of methyl ethyl ketone was heated at reflux, filtered, and concentrated to obtain 5.1 g of 2-[4-(1H-imidazol-1-yl)phenoxy]ethanol (50%). This alcohol (0.25 mole) and 5.2 g (0.030 mole) of sulfamic acid phenyl ester (Example 39) in 100 ml of dioxane was heated at reflux for 20 minutes, concentrated and the residual solid triturated in acetone. The triturant was acidified with an anhydrous solution of hydrogen chloride in isopropyl alcohol and the solid hydrochloride collected by filtration. The product was recrystallized from isopropyl alcohol-isopropyl ether to yield 4.26 g of solid, mp 156°-157° C.

Workup

  1. temperaturewas heated
  2. temperatureat reflux
  3. filtrationfiltered
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-0cf5ab49db164dbe8a76a24e32805a80
Source dataset
uspto-grants-1993_12
Patent number
US05273993

Reaction notes

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