反应详情

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0 °C

To a solution of 1-[(2-propyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)methyl]cyclohexanol (1.43 g, 4.41 mmol) in chloroform (20 mL) at rt was added m-chloroperbenzoic acid (m-CPBA, 70%, 2.17 g, 8.82 mmol). After 1.5 h, the solution was was cooled to 0° C. and concentrated ammonium hydroxide (5 mL) was added. After 3 min, p-toluenesulfonyl chloride (TsCl, 0.920 g, 4.85 mmol) was added in portions. After 1 h, the reaction mixture was filtered and the filter cake was washed with chloroform. The filtrate was washed with saturated aqueous sodium bicarbonate (50 mL) and dried over Na2SO4, filtered, and concentrated under reduced pressure to yield an orange foam which was purified twice by HPFC (silica gel, gradient elution with 0-25% CMA/CHCl3 where CMA is a solution comprised of 80% CHCl3, 18% MeOH, and 2% conc. NH4OH; followed by 0-30% CMA/CHCl3). The appropriate fractions were concentrated and triturated with acetonitrile. The solid was isolated by filtration and dried at 100° C. under vacuum to yield 1-[(4-amino-2-propyl-1H-imidazo[4,5-c][1,5]naphthyridin-1-yl)methyl]cyclohexanol (567 mg, 38%) as a white powder, mp 209.0-211.0° C. Anal. Calcd for C19H25N5O.0.2H2O C, 66.35; H, 7.47; N, 20.36. Found: C, 66.62; H, 7.34; N, 20.05.

1. waitAfter 3 min
2. waitAfter 1 h
3. filtrationthe reaction mixture was filtered
4. washthe filter cake was washed with chloroform
5. washThe filtrate was washed with saturated aqueous sodium bicarbonate (50 mL)
6. dry with materialdried over Na2SO4
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure
9. customto yield an orange foam which
10. customwas purified twice by HPFC (
11. washsilica gel, gradient elution with 0-25% CMA/CHCl3 where CMA
12. concentrationThe appropriate fractions were concentrated
13. customtriturated with acetonitrile
14. customThe solid was isolated by filtration
15. customdried at 100° C. under vacuum