Nitric Acid → HCID 23508324, Verbindung

Acetic anhydride (3.5 mL) was added slowly to a stirred solution of nitric acid (2.1 g, S.G.1.42) in glacial acetic acid (4.2 mL) cooled in an ice-water bath. This nitrating solution was then added dropwise over 5 minutes to a rapidly stirred solution of indan-2-acetic acid (1.65 g) in a mixture of glacial acetic acid (4.2 mL) and acetic anhydride (3.5 mL), whilst keeping the reaction temperature below 5° C. After stirring for a further 20 minutes at room temperature the reaction mixture was poured onto ice-water (60 mL). This mixture was extracted three times with dichloromethane. The combined extracts were washed twice with a little water, then dried over magnesium sulfate and then evaporated to give the title compound (2.22 g) as a red oil which was used without further purification.