Methanol → HCID 22221238, compound

HRID 1794403Notes

Reaction equation

HRID 1794403 reaction equation
[F:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[O:12][N:11]=[CH:10][C:9]=2[CH2:13][CH2:14][C:15]([OH:17])=[O:16])=[CH:4][CH:3]=1.S(=O)(=O)(O)O.[CH3:23]O>>[F:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]2[O:12][N:11]=[CH:10][C:9]=2[CH2:13][CH2:14][C:15]([O:17][CH3:23])=[O:16])=[CH:6][CH:7]=1

Participants

4

Reactant 3

HCID 887MethanolHCID 1118Sulfuric AcidHCID 22221136HCID 22221136, compound

Product 1

HCID 22221238HCID 22221238, compoundYield 90%

Procedure

A mixture of 3-[5-(4-fluorophenyl)-4-isoxazolyl]propionic acid (3.68 g), conc. sulfuric acid (0.05 ml) and methanol (100 ml) was refluxed for 4 hr. The reaction mixture was concentrated, water was added to the residue and the mixture was extracted with ethyl acetate. The ethyl acetate layer was washed with saturated brine, dried (MgSO4) and concentrated. The residue was subjected to silica gel column chromatography, and methyl 3-[5-(4-fluorophenyl)-4-isoxazolyl]propionate (3.50 g, yield 90%) was obtained as a pale yellow oil from a fraction eluted with ethyl acetate-hexane (1:4, volume ratio). NMR (CDCl3) δ: 2.65 (2H, t, J=7.4 Hz), 2.98 (2H, t, J=7.4 Hz), 3.69 (3H, s), 7.12–7.28 (2H, m), 7.64–7.78 (2H, m), 8.22 (1H, s).

Workup

  1. temperaturewas refluxed for 4 hr
  2. concentrationThe reaction mixture was concentrated
  3. additionwater was added to the residue
  4. extractionthe mixture was extracted with ethyl acetate
  5. washThe ethyl acetate layer was washed with saturated brine
  6. dry with materialdried (MgSO4)
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-0f8ebaa4fc514195bc03c0e651b12c80
Source dataset
uspto-grants-2006_04
Patent number
US07022725B2

Reaction notes

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