反应详情

温度

55 °C

To a stirred solution of (2S,5R)-1-(chloroacetyl)-5-ethynylpyrrolidine-2-carbonitrile (170 mg, 0.86 mmol, Example 8D) in acetonitrile (4 mL) at room temperature was added 4amino-4-methyl-3,4,5,6-tetrahydro-2H-[1,2′]bipyridinyl-4′-carbonitrile (150 mg, 0.78 mmol) and diisopropylethylamine (250 μL, 1.38 mmol). The reaction mixture was stirred at 55° C. for 48 hours, concentrated under reduced pressure and purified by flash chromatography with a gradient from 1% to 6% methanol in methylene chloride buffered with ammonium hydroxide (0.3%). Combined fractions were concentrated under reduced pressure to afford 15 mg of the desired compound. The residue was subjected to 4N HCl in dioxane (2 mL), and after 0.5 h, the volatiles were removed under reduced pressure. Solidification by trituration with diethyl ether provided the titled compound as the HCl salt. MS (CI) m/z 377 (M+H)+; 1H NMR (300 MHz, MeOH-d4) δ 8.21 (d, 1H), 7.09 (m, 1H), 6.79 (d, 1H), 4.75 (m, 1H), 4.61 (m, 1H), 3.94 (m, 2H), 3.77-3.52 (m, 4H), 3.06 (m, 1H), 2.45-2.22 (m, 4H), 1.65 (m, 4H), 1.19 (m, 3H).

1. concentrationconcentrated under reduced pressure
2. custompurified by flash chromatography with a gradient from 1% to 6% methanol in methylene chloride
3. concentrationCombined fractions were concentrated under reduced pressure