反应详情

6-chloro-N-(4-ethoxyphenyl)-7-phenylimidazo[1,2-b]pyridazin-8-amine (0.0201 g, 0.058 mmol) from 1d and (trans)-cyclohexane-1,4-diamine (0.1702 g, 1.49 mmol) were heated at 165° C. for 6 d. After cooling to room temperature, the mixture was taken up in CH2Cl2 and water, and the layers were separated. The aqueous layer was extracted with CH2Cl2 (2×). The organic layers were combined, dried over Na2SO4, filtered, and concentrated in vacuo. The residue was purified using preparative HPLC. The appropriate fraction was collected, and NaHCO3 (solid) was added to it. It was concentrated in vacuo not to dryness, and extracted with CH2Cl2 (2×). The organic layers were combined, dried over Na2SO4, filtered, and concentrated in vacuo to give the above titled compound (1.5 mg, 4.0% yield). LC/MS, m/e 443.40 (M+1). HPLC RT, 2.29 min. YMC ODSC18 column (4.6×50 mm). 0%-100% B. Solvent B: (90% MeOH, 10% H2O, 0.1% TFA). Solvent A: (10% MeOH, 90% H2O, 0.1% TFA). Gradient, start % B=0, final % B=100, gradient time 4 min, hold at 100% B 1 min, flow rate 4 mL/min.

1. customwater, and the layers were separated
2. extractionThe aqueous layer was extracted with CH2Cl2 (2×)
3. dry with materialdried over Na2SO4
4. filtrationfiltered
5. concentrationconcentrated in vacuo
6. customThe residue was purified
7. customThe appropriate fraction was collected
8. additionNaHCO3 (solid) was added to it
9. concentrationIt was concentrated in vacuo not to dryness
10. extractionextracted with CH2Cl2 (2×)
11. dry with materialdried over Na2SO4
12. filtrationfiltered
13. concentrationconcentrated in vacuo