HCID 90952840, compound → HCID 11786040, compound

Participants

Reaction Steps

The solution of the enone intermediate of Example 9 in isopropanol was charged to a hydrogenation vessel under an atmosphere of nitrogen. A slurry of wet (58 wt % water) palladium on carbon catalyst (1.27 kg) in isopropanol (10 L) was added, washing with further isopropanol (15 L). After degassing the resulting reaction mixture was hydrogenated at 2.8 bar for 2 hours. The catalyst was filtered and washed with isopropanol (4×15 L). The combined filtrates (88.0 kg) were concentrated under reduced pressure to a total volume of ca. 20 L and the solution was directly used in Example 11 without isolation of the product.

Provenance & Evidence