tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridinecarboxylate → Tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-1-piperidinecarboxylate

Participants

Reaction Steps

A solution of tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-3,6-dihydro-1(2H)-pyridinecarboxylate (2.40 g, 6.31 mmol) and 10% Pd/C (500 mg) in EtOAc (40.0 mL) and MeOH (10.0 mL) was hydrogenated (200 psi) at room temperature overnight. The reaction mixture was filtered through celite and washed with ethanol (3×10 mL). The combined extracts were concentrated in vacuo to afford 2.04 g (5.34 mmol, 85%) of tert-butyl 4-[2,4-difluoro-5-(isobutyrylamino)phenyl]-1-piperidinecarboxylate: ESMS m/e: 383.2 (M+H)+.

Provenance & Evidence