反应详情

A solution of chlorosulfonyl isocyanate (870 μl, WAKO) in benzene (10 ml) was added dropwise with formic acid (377 μl, WAKO) under ice cooling, warmed to room temperature, stirred and for 19.5 hours, then warmed to 40° C., and further stirred for 4 hours. The reaction mixture was added dropwise with a solution of 2-amino-6-bromonaphthalene (443 mg) in benzene (5 ml) under ice cooling, warmed to room temperature, and stirred 21.5 hours. The reaction mixture was filtered to obtain solid, and the solid was added with ethyl acetate, mixed and filtered again. The solvent of the filtrate was evaporated under reduced pressure. The residue was purified by column chromatography (Quad, hexane:ethyl acetate=2:1) to obtain the title compound (Intermediate 66, 158 mg).

1. temperaturewarmed to 40° C.
2. stirringfurther stirred for 4 hours
3. temperaturewarmed to room temperature
4. stirringstirred 21.5 hours
5. filtrationThe reaction mixture was filtered
6. customto obtain solid
7. additionmixed
8. filtrationfiltered again
9. customThe solvent of the filtrate was evaporated under reduced pressure
10. customThe residue was purified by column chromatography (Quad, hexane:ethyl acetate=2:1)