HCID 59508382, compound → HCID 83410482, compound

Participants

Reaction Steps

1-Bromo-4-(2,2-diethoxyethoxy)-2-fluorobenzene (11.4 g, 0.037 mol) was dissolved in toluene (78 mL). Polyphosphoric acid (11.9 g) was added and the mixture was heated to reflux for 5 h. The solvent was removed and the residue was diluted with water and ethyl acetate. The organic phase was washed with 2M NaOH solution and then dried over Na2SO4. A mixture of 5-bromo-6-fluorobenzofuran and 5-bromo-4-fluorobenzofuran (4.8 g, 60.3%) were obtained as a mixture after purification via column chromatography.

Provenance & Evidence