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With ammonia; hydrogen In methanol at 20℃; for 6 h;
A mixture of 1-tosyl-1 H-indole-4-carbonitrile (0.5 g, 1.69 mmol), 5percent NH3 in methanol (5.0 mL) and Raney Nickel (0.2 g) in methanol (15.0 ml) was hydrogenated at 5 Torr for 6 h at it After completion of the reaction, the Raney Nickel was filtered off through a pad of celite under vacuum and washed with methanol (5 x 2 mL). The combined filtrates were evaporated to dryness under reduced pressure. The residue was washed with 10 percent diethyl ether in pentane to yield the title compound as a white solid (0.45 g, 78 percent). [1H-NMR (CDCI3, 300 MHz): δ 7.72-7.59 (m, 3H), 7.44-7.52 (m, 1 H), 7.33-6.72 (m, 5 H), 4.12-4.01 (m, 2H), 2.27 (s, 3H)].
With N-ethyl-N,N-diisopropylamine In acetonitrile at 20℃; for 4h;
38.a
To a stirred solution of 4-Cyano indole (0.5 g, 3.5 mmol), diisopropylethylamine (1.8 mL, 10.5 mmol) in acetonitrile (5.0 mL), p-toluene sulfonyl chloride (0.8 g, 4.22 mmol) was added and the mixture was stirred at rt for 4 h. The solvent was evaporated under reduced pressure and the residue was diluted with ethyl acetate. The organic layer was washed with water, dried over anhydrous sodium sulfate and concentrated to yield the title compound as brown colored solid (0.95 g, 90 %). [1H-NMR (CDCI3, 300 MHz): δ 8.22 (d, 1 H), 7.81-7.72 (m, 3H), 7.56 (d, 1H), 7.38 (t, 1H), 7.29-7.22 (m, 2H), 6.88 (d, 1 H), 2.39 (s, 3H)]. )
With ammonia; hydrogen;Raney Nickel; In methanol; at 20.0℃; under 5.0 Torr; for 6.0h;
A mixture of 1-tosyl-1 H-indole-4-carbonitrile (0.5 g, 1.69 mmol), 5% NH3 in methanol (5.0 mL) and Raney Nickel (0.2 g) in methanol (15.0 ml) was hydrogenated at 5 Torr for 6 h at it After completion of the reaction, the Raney Nickel was filtered off through a pad of celite under vacuum and washed with methanol (5 x 2 mL). The combined filtrates were evaporated to dryness under reduced pressure. The residue was washed with 10 % diethyl ether in pentane to yield the title compound as a white solid (0.45 g, 78 %). [1H-NMR (CDCI3, 300 MHz): delta 7.72-7.59 (m, 3H), 7.44-7.52 (m, 1 H), 7.33-6.72 (m, 5 H), 4.12-4.01 (m, 2H), 2.27 (s, 3H)].
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