Allyl bromide → HCID 20823144, compound

HRID 348291Notes

Reaction equation

HRID 348291 reaction equation
[CH2:1]([O:3][C:4](=[O:22])[C:5]([CH3:21])([O:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([OH:13])=[CH:9][CH:8]=1)[CH3:2].[CH2:23](Br)[CH:24]=[CH2:25].C(=O)([O-])[O-].[K+].[K+]>C(C(C)=O)C>[CH2:1]([O:3][C:4](=[O:22])[C:5]([CH3:21])([O:14][C:15]1[CH:20]=[CH:19][CH:18]=[CH:17][CH:16]=1)[CH2:6][C:7]1[CH:12]=[CH:11][C:10]([O:13][CH2:25][CH:24]=[CH2:23])=[CH:9][CH:8]=1)[CH3:2]

Participants

5

Reactant 3

HCID 7841Allyl bromideHCID 11430Potassium CarbonateHCID 11220314Ethyl 3-(4-hydroxyphenyl)-2-methyl-2-phenoxypropionate

Product 1

HCID 20823144HCID 20823144, compoundYield 84.1%

Reagents, catalysts & solvents 1

HCID 6569Methyl Ethyl KetoneSolvent

Procedure

A solution of 3-(4-hydroxyphenyl)-2-methyl-2-phenoxy-propionic acid ethyl ester (500 mg, 1.67 mmol) in methyl ethyl ketone (6 mL) was treated with allyl bromide (232 mg, 1.92 mmol, 0.17 mL) and potassium carbonate (311 mg, 2.25 mmol) and then heated to reflux. After 18 h, the mixture was cooled to ambient temperature and then partitioned between ethyl acetate and water. The aqueous phase was extracted with ethyl acetate and then the organic phases were dried (MgSO4), filtered and concentrated under reduced pressure. The residue was purified by column chromatography (100 mL SiO2, hexanes to 10% ethyl acetate/hexanes) to provide the desired product (478 mg, 84%) as a clear, colorless oil: 1H NMR (400 MHz, CDCl3) δ 7.22 (t, J=8.0 Hz, 2H), 7.16 (d, J=8.8 Hz, 2H), 6.97 (dt, J=7.6, 1.2 Hz, 1H), 6.83 (d, J=7.8 Hz, 2H), 6.84 (t, J=8.4 Hz, 2H), 6.05 (ddd, J=17.2, 10.6, 5.2 Hz, 1H), 5.41 (dd, J=17.2, 1.6 Hz, 1H), 5.28 (dd, J=10.8, 1.4 Hz, 1H), 4.22 (d, J=5.2 Hz, 2H), 4.19 (q, J=6.8 Hz, 2H), 3.27 (A of AB, J=14 Hz, 1H), 3.11 (B of AB, J=14 Hz, 1H), 1.40 (s, 3H), 1.21 (t, J=6.8 Hz, 3H).

Workup

  1. temperatureheated to reflux
  2. custompartitioned between ethyl acetate and water
  3. extractionThe aqueous phase was extracted with ethyl acetate
  4. dry with materialthe organic phases were dried (MgSO4)
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe residue was purified by column chromatography (100 mL SiO2, hexanes to 10% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-47ab16942e1e4a2a83f82f875e6b7a8c
Source dataset
uspto-grants-2007_02
Patent number
US07176224B2

Reaction notes

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