反应详情

To a rb flask containing tert-butyl 5-(3-(4-(methoxycarbonyl)phenoxy)pyrazin-2-yl)-3,4-dihydropyridine-1(2H)-carboxylate (900 mg, 2.187 mmol) and palladium on carbon (233 mg, 0.219 mmol) (10 wt %) under N2 is added THF (5.5 mL) and EtOH (5.5 mL). The flask is purged with H2 (3×), then stirred under H2 at rt 3 h. The reaction was filtered through celite and the filter cake washed with EtOAc (2×10 mL). The combined filtrates were concentrated and the residue purified by ISCO (12 g SiO2, 0-50% EtOAc/Hexane) to give tert-butyl 3-(3-(4-(methoxycarbonyl)phenoxy)pyrazin-2-yl)piperidine-1-carboxylate as a brown solid.

1. customThe flask is purged with H2 (3×)
2. filtrationThe reaction was filtered through celite
3. washthe filter cake washed with EtOAc (2×10 mL)
4. concentrationThe combined filtrates were concentrated
5. customthe residue purified by ISCO (12 g SiO2, 0-50% EtOAc/Hexane)