Diisopropylethylamine → 3-(3,3''-dimethyl-3',4',5',6'-tetrahydro-2'H-[2,2'; 6',2'']terpyridin-1'-ylmethyl)-benzonitrile

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Reaction Steps

Using General Procedure A: A solution of 3,3″-dimethyl-1′,2′,3′,4′,5′,6′-hexahydro-[2,2′;6′,2″]terpyridine (0.414 g, 1.55 mmol), α-bromo-m-tolunitrile (0.466 g, 2.38 mmol), KI (53 mg, 0.32 mmol), and DIPEA (0.55 mL, 3.16 mmol) in DMF (8 mL) was heated at 60° C. for 18 hours. Purification of the crude material by column chromatography on silica gel (40:1:1 CH2Cl2—CH3OH—NH4OH) provided 0.447 g (75%) of 3-(3,3″-dimethyl-3′,4′,5′,6′-tetrahydro-2′H-[2,2′;6′,2″]terpyridin-1′-ylmethyl)-benzonitrile as a beige solid. 1H NMR (CDCl3) δ 1.56-1.72 (m, 3H), 2.05-2.10 (m, 1H), 2.18-2.34 (m, 2H), 2.41 (s, 6H), 3.53 (s, 2H), 4.10 (d, 2H, J=11.1 Hz), 6.71 (s, 1H), 6.83 (d, 1H, J=7.8 Hz), 6.93-7.00 (m, 3H), 7.13 (d, 1H, J=7.5 Hz), 7.25-7.27 (m, 2H), 8.39 (dd, 2H, J=4.8, 1.2 Hz); ES-MS m/z 383 (M+H).

Provenance & Evidence