Acetone → 4-Bromo-2,3-difluoro-oxiranylmethoxy benzene

HRID 587818Notes

Reaction equation

HRID 587818 reaction equation
[Br:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[C:4]([F:9])[C:3]=1[F:10].C(=O)([O-])[O-].[K+].[K+].[CH3:17][C:18]([CH3:20])=[O:19]>>[Br:1][C:2]1[CH:7]=[CH:6][C:5]([O:8][CH2:17][CH:18]2[CH2:20][O:19]2)=[C:4]([F:9])[C:3]=1[F:10]

Participants

4

Reactant 3

HCID 180AcetoneHCID 11430Potassium CarbonateHCID 102199424-Bromo-2,3-difluorophenol

Product 1

HCID 866038934-Bromo-2,3-difluoro-oxiranylmethoxy benzeneYield 71%

Procedure

A solution of the crude 4-bromo-2,3-difluorophenol (0.40 g) [prepared using published procedure, WO0121606] and (2R)-glycidyl 3-nitrobenzenesulfonate (0.49 g) in dry acetone (19 mL) was treated with potassium carbonate (0.79 g) and refluxed under nitrogen for 12 h. The reaction was cooled, filtered and filtrate was concentrated in vacuo and the residue was flash chomatogaphed (20% ethyl acetate/hexanes) to yield the desired product (0.33 g) in 71% yield. 1H-NMR (400 MHz, CDCl3) δ: 7.23-7.19 (m, 1H), 6.74-6.71 (m, 1H), 4.35-4.32 (m, 1H), 4.03-3.99 (m, 1H), 3.38-3.35 (m, 1H), 2.93-2.92 (m, 1H), 2.77-2.76 (m, 1H).

Workup

  1. temperaturerefluxed under nitrogen for 12 h
  2. temperatureThe reaction was cooled
  3. filtrationfiltered
  4. concentrationfiltrate was concentrated in vacuo

Sources & evidence

ORD record
ord-169f0bdb08fe448bafdc85ae952f0a64
Source dataset
uspto-grants-2016_01
Patent number
US09227914B2

Reaction notes

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