反应详情

To a solution of N1,N1-bis-(3-methyl-pyridin-2-ylmethyl)-butane-1,4-diamine (0.1970 g, 0.46 mmol) in DMF (5 mL) was added 1H-pyrazole-carboxamidine hydrochloride (0.0681 g, 0.46 mmol) and DIPEA (0.48 mL, 2.76 mmol) and stirred at room temperature for 16 hours. The reaction mixture was concentrated, and purification of the crude material by column chromatography on silica gel (20:1:1, then 10:1:1, then 1:1:1 CH2Cl2-MeOH—NH4OH) followed by radial chromatography on silica gel (20:4:1 CH2Cl2-MeOH—NH4OH) provided 0.1380 g (64%) of COMPOUND 196 as a white solid. 1H NMR (CDCl3) δ 1.49-1.53 (m, 2H), 1.65-1.69 (m, 2H), 2.17 (s, 6H), 2.70-2.75 (m, 4H), 3.12-3.14 (m, 2H), 3.87 (s, 4H), 7.10-7.14 (m, 2H), 7.41-7.44 (m, 2H), 8.34-8.39 (m, 2H). 13C NMR (CDCl3) δ 18.53, 23.14, 26.99, 41.30, 54.57, 58.09, 123.15, 133.48, 138.87, 146.21, 155.66, 158.02. ES-MS m/z 341.3 (M+H). Anal. Calcd. for C19H28N6.1.1CH2Cl2.1.8H2O: C, 51.77; H, 7.31; N, 18.02. Found: C, 51.50; H, 7.04; N, 18.31.

1. concentrationThe reaction mixture was concentrated
2. custompurification of the crude material by column chromatography on silica gel (20:1:1