反应详情

tert-Butyl 2-methoxy-2-methyl-1-((4-(5-methyl-3-oxo-1H-imidazo[1,5-c]imidazol-2(3H)-yl)-1-piperidinyl)carbonyl)propylcarbamate (0.36 g) obtained in Example 73d) was added a 4 N solution of hydrogen chloride in ethyl acetate (2.6 ml), mixed at room temperature for 5 minutes, and then concentrated under reduced pressure. The residue was dissolved in acetonitrile (5 ml), triethylamine (0.14 ml) and 4-chlorophenyl isocyanate (0.08 g) were added thereto, and mixed at room temperature for 3 hours. The solvent was distilled off under reduced pressure, and the residue was dissolved in ethyl acetate. The ethyl acetate solution was washed with an aqueous sodium hydrogen carbonate solution and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the residue was purified with basic silica gel column (ethyl acetate to ethyl acetate/methanol=10/1). The product was crystallized from ethyl acetate-diethyl ether to obtain the title compound as colorless powder (0.28 g, 71%).

1. additionmixed at room temperature for 5 minutes
2. concentrationconcentrated under reduced pressure
3. dissolutionThe residue was dissolved in acetonitrile (5 ml)
4. additiontriethylamine (0.14 ml) and 4-chlorophenyl isocyanate (0.08 g) were added
5. additionmixed at room temperature for 3 hours
6. distillationThe solvent was distilled off under reduced pressure
7. dissolutionthe residue was dissolved in ethyl acetate
8. washThe ethyl acetate solution was washed with an aqueous sodium hydrogen carbonate solution
9. dry with materialdried over anhydrous magnesium sulfate
10. distillationThe solvent was distilled off under reduced pressure
11. customthe residue was purified with basic silica gel column (ethyl acetate to ethyl acetate/methanol=10/1)
12. customThe product was crystallized from ethyl acetate-diethyl ether