HCID 19030722, compound → HCID 19030970, compound

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Reaction Steps

To 10 % Pd-C (0.1 g) is added acetic acid (20 ml) and then 1-(4-nitrophenyl)carbostyril (0.9 g) and the mixture is subjected to catalytic reduction at 80° C. under normal pressure. After completion of the reaction, 10 % Pd--C is removed by filtration and the resulting solution is concentrated under reduced pressure. To the concentrate is added water and the solution is made alkaline with an aqueous sodium hydroxide solution and then extracted with dichloromethane. The extract is washed with water and dried over magnesium sulfate. The solvent is distilled off under reduced pressure and the residue is purified by silica gel column chromatography and recrystallized from ethanol to give 1-(4-aminophenyl)carbostyril (0.66 g) as brown powders, m.p. 225°-230° C.

Provenance & Evidence