反应详情

温度

80 °C

To a solution of (R)-1-(5,6-diaminopyridin-2-yl)-N-ethyl-N-methylpiperidine-3-carboxamide (200 mg, 0.722 mmol) in ethanol (10 mL) was added 2-cyclopropylpyrimidine-4-carbaldehyde (106 mg, 0.722 mmol), sulfur powder (69 mg, 2.16 mmol), and acetic acid (0.2 mL). The reaction mixture was heated to 80° C. for 18 h. The solvent was evaporated and the residue was partitioned between ethyl acetate and water. The organic layer was concentrated under reduced pressure. The crude material was purified via preparative HPLC to afford the title compound (40 mg, 13.5%). 1H NMR (300 MHz, CDCl3) δ 1.09-1.18 (m, 3H), 1.19-1.31 (m, 4H), 1.65-1.73 (m, 1H), 1.84 (d, 1H), 1.88-1.98 (m, 2H), 2.31 (d, 1H), 2.69-2.87 (m, 1H), 2.99 (br s, 1H), 3.03 (br s, 1H), 3.11 (br s, 1H), 3.14-3.27 (m, 1H), 3.37-3.57 (m, 2H), 4.37 (d, 1H), 4.45-4.59 (m, 1H), 6.76 (d, 1H), 7.79-7.96 (m, 1H), 8.67 (d, 1H), 10.25 (br s, 1H). MS (ES+APCI) (M+H) 406.3; LCMS retention time 3.055 min (Method U1).

1. customThe solvent was evaporated
2. customthe residue was partitioned between ethyl acetate and water
3. concentrationThe organic layer was concentrated under reduced pressure
4. customThe crude material was purified via preparative HPLC