反应详情

To a stirred solution of 9,10-dihydro-8H-[1,2]oxazino[2′,3′:1,2]imidazo[4,5-c][1,5]naphthyridine 5-oxide (0.13 g, 0.54 mmol) in dichloromethane (10 mL) was added trichloroacetyl isocyanate (0.08 mL, 0.67 mmol). After 1.5 hours, the solution was concentrated under reduced pressure and methanol (4 mL) and sodium methoxide (2 drops of a 25% w/w solution in methanol) were added with stirring. After 18 hours the solution was concentrated under reduced pressure. The resulting solid was recrystallized from methanol/ethyl acetate to provide 9,10-dihydro-8H-[1,2]oxazino[2′,3′:1,2]imidazo[4,5-c]-1,5-naphthyridin-6-amine.

1. concentrationthe solution was concentrated under reduced pressure and methanol (4 mL) and sodium methoxide (2 drops of a 25% w/w solution in methanol)
2. additionwere added
3. concentrationAfter 18 hours the solution was concentrated under reduced pressure
4. customThe resulting solid was recrystallized from methanol/ethyl acetate