反应详情

温度

50 °C

A solution of (3-hydroxy-4-nitro-phenyl)-acetic acid ethyl ester (5.0 g, Reference Example 4) was dissolved in ethanol (approximately 200 mL) was treated with ammonium formate (approximately 20 g). The mixture was warmed to 50° C. and then treated cautiously with palladium on charcoal (approximately 1 g, 5%)—effervescence was observed. After 30 minutes the mixture was filtered hot through a pad of filter-aid and the filtrate was concentrated to give the title compound (3.3 g) as a black solid.

1. filtrationAfter 30 minutes the mixture was filtered hot through a pad
2. filtrationof filter-aid
3. concentrationthe filtrate was concentrated