反应详情

温度

165 °C

To 6-chloro-N-(4-ethoxyphenyl)-7-methylimidazo[1,2-b]pyridazin-8-amine (40 mg, 0.14 mmol) from Example III(1), step 1d was added cis-1,4-diaminocyclohexane (250 mg, 2.19 mmol). The mixture was allowed to heat at 165° C. for 48 hrs. The reaction mixture then cooled, diluted with methanol and purified by preparative HPLC. The eluent was then concentrated in vacuo, diluted with methanol (2 mL), purified and neutralized by passing through a 500 mg SCX (Cation exchange column). The eluent was concentrated to give 6.0 mg (11.3%) of the titled compound. 1H NMR (500 MHz, MeOH) δ ppm 7.65 (1H, s), 7.25 (1H, s), 6.85 (4 H, m), 3.95 (2H, d, J=7.2 Hz), 3.95 (1H, m), 3.05 (1H, m), 1.95 (2H, m), 1.85 (3H, s), 1.80 (4H, m), 1.65 (2H, m), 1.35 (3H, t, J=7.2 Hz). LC/MS m/e 381 (M+1). HPLC, 1.91 min. Waters Sunfire C18 4.6×50.0%-100% B. B: 90% MeOH, 10% H2O, 0.1% TFA. A: 10% MeOH, 90% H2O, 0.1% TFA, gradient time 4 min, hold at 100% B 1 min, flow rate 4 mL/min.

1. temperatureThe reaction mixture then cooled
2. custompurified by preparative HPLC
3. concentrationThe eluent was then concentrated in vacuo
4. additiondiluted with methanol (2 mL)
5. custompurified
6. concentrationThe eluent was concentrated