Hydrochloric Acid → 1-(Benzo[b]furan-5-yl)-2-(pyridin-3-ylmethoxy)ethanol

HRID 2259387Notes

Reaction equation

HRID 2259387 reaction equation
[N:1]1[CH:6]=[CH:5][CH:4]=[C:3]([CH2:7][OH:8])[CH:2]=1.CC(C)([O-])C.[K+].[O:15]1[CH:19]=[CH:18][C:17]2[CH:20]=[C:21]([CH:24]3[CH2:26][O:25]3)[CH:22]=[CH:23][C:16]1=2.Cl>C(OCC)(=O)C.CS(C)=O>[O:15]1[CH:19]=[CH:18][C:17]2[CH:20]=[C:21]([CH:24]([OH:25])[CH2:26][O:8][CH2:7][C:3]3[CH:2]=[N:1][CH:6]=[CH:5][CH:4]=3)[CH:22]=[CH:23][C:16]1=2

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 75103-PyridinemethanolHCID 23665647Potassium tert-butoxideHCID 451225992-(Benzo[b]furan-5-yl)oxirane

Product 1

HCID 544244681-(Benzo[b]furan-5-yl)-2-(pyridin-3-ylmethoxy)ethanolYield 14.2%

Reagents, catalysts & solvents 2

HCID 679Dimethyl SulfoxideSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
80 °C

Procedure

A mixture of 1.6 g of 3-pyridinemethanol, 1.7 g of potassium tert-butoxide and 23 ml of dimethyl sulfoxide was heated to 80° C. Thereto was added 2.4 g of 2-(benzo[b]furan-5-yl)oxirane. The resulting mixture was stirred at 85°-90° C. for 15 minutes. The reaction mixture was added to a mixture of 50 ml of ice water and 50 ml of ethyl acetate. The resulting mixture was adjusted to pH 1 with 6N hydrochloric acid. The aqueous layer was separated and 30 ml of ethyl acetate was added thereto. The resulting mixture was adjusted to pH 9.5 with potassium carbonate. The organic layer was separated, washed with water and a saturated aqueous sodium chloride solution in this order, and dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure. The residue thus obtained was purified by column chromatography (eluant: chloroform/ethanol=50/1) to obtain 0.56 g of 1-(benzo[b]furan-5-yl)-2-(pyridin- 3-ylmethoxy)ethanol (compound No. 339).

Workup

  1. customThe aqueous layer was separated
  2. addition30 ml of ethyl acetate was added
  3. customThe organic layer was separated
  4. washwashed with water
  5. dry with materiala saturated aqueous sodium chloride solution in this order, and dried over anhydrous magnesium sulfate
  6. customThe solvent was removed by distillation under reduced pressure
  7. customThe residue thus obtained
  8. customwas purified by column chromatography (eluant: chloroform/ethanol=50/1)

Sources & evidence

ORD record
ord-46789670eafc41ecac3a3d3cd26021c9
Source dataset
uspto-grants-1995_12
Patent number
US05472984

Reaction notes

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