2-[4-(Trifluoromethyl)phenyl]pyrazine → 2-[4-(Trifluoromethyl)phenyl]piperazine

Participants

Reaction Steps

The pyrazine from Step 1 (13 g, 0.058 mol) was dissolved in acetic acid (100 mL) and palladium acetate added. This mixture was hydrogenated at 45 psi for 4 h., then filtered to remove catalyst and the filtrate concentrated in vacuo to give the product as brown solid. 1H NMR (500 MHz, CD3OD): δ 1.98 (6H, s), 2.93 (1H, t, J 11.9), 3.03-3.15 (2H, m), 3.26-3.32 (3H, m), 4.09 (1H, dd, J 2.7, 11.2), 7.65 (2H, d, J 8.3), 7.72 (2H, d, J 8.2).

Provenance & Evidence