Pyridine → Methyl 4-(2-oxiranylmethoxy)benzeneacetate

HRID 2270037Notes

Reaction equation

HRID 2270037 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([CH2:8][C:9]([O:11][CH3:12])=[O:10])=[CH:4][CH:3]=1.[CH2:13]([CH:15]1[O:17][CH2:16]1)Cl.N1C=CC=CC=1>>[O:17]1[CH2:16][CH:15]1[CH2:13][O:1][C:2]1[CH:3]=[CH:4][C:5]([CH2:8][C:9]([O:11][CH3:12])=[O:10])=[CH:6][CH:7]=1

Participants

4

Reactant 3

HCID 1049PyridineHCID 7835EpichlorohydrinHCID 518900Benzeneacetic acid, 4-hydroxy-, methyl ester

Product 1

HCID 12941054Methyl 4-(2-oxiranylmethoxy)benzeneacetateYield 34%

Conditions

Temperature
85 °C

Procedure

A mixture of methyl 4-hydroxyphenylacetate (4.98 g, 0.03 mol), epichlorohydrin (23.5 ml, 0.30 mol) and pyridine (121 μl, 1.5 mmol) was stirred at 85° C. for 2 h. The reaction mixture was cooled, and excess epichlorohydrin was distilled off (rotavapor). The residue was taken up in ethyl acetate, washed with brine and dried (Na2SO4) The solution was filtered and concentrated. The dark residue was chromatographed (silica, hexane/ethyl acetate 7:3) to give 2.25 g (34%) of a colourless oil. 1H (300 MHz) and 13C NMR (75 MHz) spectra were in accordance with the structure.

Workup

  1. temperatureThe reaction mixture was cooled
  2. distillationexcess epichlorohydrin was distilled off (rotavapor)
  3. washwashed with brine
  4. dry with materialdried (Na2SO4) The solution
  5. filtrationwas filtered
  6. concentrationconcentrated
  7. customThe dark residue was chromatographed (silica, hexane/ethyl acetate 7:3)

Sources & evidence

ORD record
ord-a6728e2a18d145f6b90cf300f0d4b3fe
Source dataset
uspto-grants-2001_12
Patent number
US06331289B1

Reaction notes

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