Trifluoroacetic acid → 7-(Piperidin-1-yl)-2,3-di-p-tolyl-5,6,7,8-tetrahydropyrido[2,3-b]pyrazine

Participants

Reaction Steps

A solution of tert-butyl 7-(piperidin-1-yl)-2,3-di-p-tolyl-7,8-dihydropyrido[2,3-b]pyrazine-5(6H)-carboxylate (step 6) (90 mg, 0.180 mmol) in DCM (1 ml) was treated with TFA (0.501 mL, 6.50 mmol) and stirred at room temperature for 3 hours. The resulting mixture was diluted with DCM (3 ml) and washed with a saturated solution of sodium hydrogen carbonate. The organic portion was passed through a phase separating column and the solvent removed under reduced pressure to afford the titled compound;

Provenance & Evidence