Water → HCID 72483449, compound

Participants

Reaction Steps

8.5 g (20.8 mmol) of (±)-(4aR*, 9bS*)-7-ethoxy-3-(4-ethoxy-2,3-difluorophenyl)-6-fluoro-1,2,3,4,4a,9b-hexahydrodibenzofuran-3-ol in 200 ml of toluene are heated on a water separator for 30 min together with 396 mg (2.08 mmol) of p-toluenesulfonic acid monohydrate. After cooling, the batch is filtered adsorptively (SiO2, ethyl acetate:n-heptane=4:1), and the filtrate is concentrated to dryness. The product mixture obtained in this way can be used directly for the following reaction.

Provenance & Evidence