4-Hydroxybenzaldehyde → 4-[2-(2-Fluorophenyl)-2-hydroxyethoxy]benzaldehyde

HRID 1873807Notes

Reaction equation

[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH:8]1[CH2:10][O:9]1.[OH:11][C:12]1[CH:19]=[CH:18][C:15]([CH:16]=[O:17])=[CH:14][CH:13]=1.[OH-].[Na+]>C1(C)C=CC=CC=1>[F:1][C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][C:3]=1[CH:8]([OH:9])[CH2:10][O:11][C:12]1[CH:19]=[CH:18][C:15]([CH:16]=[O:17])=[CH:14][CH:13]=1

Participants

Conditions

Temperature: 78 °C

Procedure

To a stirring solution of 2-(2-fluorophenyl)oxirane (5.30 g, 38.4 mmol) in toluene (65 ml) was added 4-hydroxybenzaldehyde (7.0 g, 58.0 mmol), 1M NaOH (65 ml) and PEG4000 (polyethylene glycol, 0.85 g) and the stirring mixture was heated at 78° C. overnight. The reaction was allowed to cool to RT and then extracted with EtOAc (2×150 ml). The combined extracts were washed with brine, dried (Na2SO4), filtered and evaporated in vacuo. The resulting light brown oil was adsorbed onto silica gel and chromatographed, eluting with 30-40% EtOAc/hexanes. There are 2 major spots. Fractions containing the higher Rf spot were combined and evaporated in vacuo to give 1.10 g (11%) of the title compound as a colorless oil. Fractions containing the lower Rf spot were combined and evaporated in vacuo to give 0.67 g (7%) of the regioisomer as a colorless oil.

Workup

temperatureto cool to RT
extractionextracted with EtOAc (2×150 ml)
washThe combined extracts were washed with brine
dry with materialdried (Na2SO4)
filtrationfiltered
customevaporated in vacuo
customchromatographed
washeluting with 30-40% EtOAc/hexanes
additionFractions containing the higher Rf spot
customevaporated in vacuo

Sources & evidence

ORD record: ord-83311a6b116b4c48b9a90cce0a64cb09
Source dataset: uspto-grants-2012_11
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08304441B2

Reaction notes

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