Example 104
To a solution of compound 491 (100 mg, 0.236 mmol) in MeOH (4 mL) was added Pd/C (10 mg, 10 wt %) in a hydrogenation bottle. The mixture was stirred under 1 atm H2 overnight, filtered through Celite (filter aid), and the filtrate was concentrated to afford the title compound (92.9 mg, —100% yield). ESI m/z calcd for C21H36N3O4 [M+H]+: 394.26, found 394.26.