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A mixture of 3-phenoxybenzyl acetate 50 (21.8 g, 90 mmol) (prepared by acetylation of commercial 3-phenoxybenzyl alcohol) and palladium acetate (40 g, 179 mmol) in acetic acid (300 mL) was refluxed for 6 h, cooled and filtered. The filtrate was evaporated to dryness and the residue treated with 100 mL of a mixture cyclohexane/ethyl acetate (6/1) and filtered. The filtrate was concentrated to give a colored oil which was purified by chromatography on silica gel (cyclohexane/ethyl acetate, 6/1) to afford pure dibenzofuran-3-yl-methyl acetate 51 (3.4 g) and a mixture of dibenzofuran-3-yl-methyl acetate 51 (Rf=0.6) and dibenzofuran-1-yl-methyl acetate 52 contaminated with compound 51 (Rf of compound 52=0.53) (8.4 g) as a white solid.

1. temperaturewas refluxed for 6 h
2. temperaturecooled
3. filtrationfiltered
4. customThe filtrate was evaporated to dryness
5. additionthe residue treated with 100 mL of a mixture cyclohexane/ethyl acetate (6/1)
6. filtrationfiltered
7. concentrationThe filtrate was concentrated
8. customto give a colored oil which
9. customwas purified by chromatography on silica gel (cyclohexane/ethyl acetate, 6/1)