反应详情

5-Nitroisoquinoline-3-carboxylic acid (44 g) is dissolved in methanol (3 liters), and a catalyst consisting of palladium-on-carbon (3/97 by weight; 15 g) is added. The mixture is hydrogenated at atmospheric pressure, at a temperature between 20° and 25° C. After stirring for 5 hours, the volume of hydrogen absorbed is 13.9 liters. The mixture is filtered through diatomaceous silica and the filtrate is concentrated to dryness under reduced pressure (20 mm Hg; 2.7 kPa) at 60° C. to yield 5-aminoisoquinoline-3-carboxylic acid (35 g).

1. additionis added
2. customis hydrogenated at atmospheric pressure, at a temperature between 20° and 25° C
3. customthe volume of hydrogen absorbed
4. filtrationThe mixture is filtered through diatomaceous silica
5. concentrationthe filtrate is concentrated to dryness under reduced pressure (20 mm Hg; 2.7 kPa) at 60° C.