反应详情

A suspension of [6-(4-cyano-phenyl)-pyridin-2-yl]carbamic acid tert-butyl ester (7.0 g, 24 mmol), Raney Ni (1.0 g) in EtOH (500 mL) and NH3.H2O (10 mL) was hydrogenated under H2 (50 psi.) at 50° C. for 6 h. The catalyst was filtered off and the filtrate was concentrated to dryness to give [6-(4-aminomethyl-phenyl)-pyridin-2-yl]-carbamic acid tert-butyl ester, which was used directly in next step. 1H NMR (300 MHz, CDCl3) δ 7.83-7.92 (m, 3 H), 7.70 (t, J=7.8 Hz, 1 H), 7.33-7.40 (m, 4 H), 3.92 (br s, 2 H), 1.53 (s, 9 H).

1. filtrationThe catalyst was filtered off
2. concentrationthe filtrate was concentrated to dryness