反应详情

Using General Procedure A: A solution of 3,3″-dimethyl-1′,2′,3′,4′,5′,6′-hexahydro-[2,2′;6′,2″]terpyridine (0.502 g, 1.83 mmol), α-bromo-p-tolunitrile (0.538 g, 2.75 mmol), KI (65 mg, 0.40 mmol), and DIPEA (0.72 mL, 4.13 mmol) in DMF (9 mL) was heated at 60° C. for 16 hours. Purification of the crude material by column chromatography on silica gel (40:1:1 CH2Cl2—CH3OH—NH4OH) provided 0.66 g (94%) of 4-(3,3″-dimethyl-3′,4′,5′,6′-tetrahydro-2′H-[2,2′;6′,2″]terpyridin-1′-ylmethyl)-benzonitrile as a white solid. 1H NMR (CDCl3) δ 1.60-1.73 (m, 3H), 2.02-2.12 (m, 1H), 2.18-2.34 (m, 2H), 2.41 (s, 6H), 3.56 (s, 2H), 4.14 (d, 2H, J=10.5 Hz), 6.64 (d, 2H, J=8.1 Hz), 6.95 (dd, 2H, J=7.5, 4.8 Hz), 7.10 (d, 2H, J=7.8 Hz), 7.22 (d, 2H, J=7.2 Hz), 8.37 (d, 2H, J=3.9 Hz); ES-MS m/z 383 (M+H).

1. customPurification of the crude material by column chromatography on silica gel (40:1:1 CH2Cl2—CH3OH—NH4OH)