反应详情

A mixture of 2′-chloro-4′-fluoro-5′-nitroacetanilide (26.1 g, 112 mmol) and 5% platinum on carbon (7.8 g, 30 wt %) in a tetrahydrofuran/ethyl acetate/ethanol solution (1:1:1) is hydrogenated at 50 psi for 22 hours and filtered. The resultant filtrate is concentrated in vacuo to obtain a solid which is recrystallized from an ethanol/water solution to give the title product as off-white plates (14.5 g, mp 176-178° C.).

1. filtrationfiltered
2. concentrationThe resultant filtrate is concentrated in vacuo
3. customto obtain a solid which
4. customis recrystallized from an ethanol/water solution