Trifluoroacetic acid → Trifluoroacetic acid

Participants

Reaction Steps

To a solution of 2-benzyl-5-phenyl-1,2,3,4-tetrahydro-2,6-naphthyridine, 2 TFA (0.48 g, 0.908 mmol) in MeOH (10 mL) was added Pd/C (0.193 g, 0.182 mmol). The mixture was flushed with N2, then was purged with H2 and stirred at rt under 1 atm. After stirring the reaction for 3 h it was filtered through a pad of CELITE®. The organic solution was concentrated under reduced pressure to give 5-phenyl-1,2,3,4-tetrahydro-2,6-naphthyridine, 2 TFA (0.398 g, 0.908 mmol, 100% yield) as a light-brown oil which crystallized under vacuum. The residue was used in the next step with no additional purification. LC/MS: m/z 211.00 (M+H)+, 0.270 min (method 7). 1H NMR (500 MHz, MeOD) δ ppm 8.66 (d, 1H) 7.74 (d, J=5.49 Hz, 1H) 7.57-7.67 (m, 5H) 4.69 (s, 2H) 3.54 (t, J=6.10 Hz, 2H) 3.11 (t, J=6.10 Hz, 2H).

Provenance & Evidence