Abstract
Nitration of 3-methoxyfluorene yielded 2-nitro-3-methoxyfluorene (mp 183-4°C) as a main product. This was used for syntheses of 2-amino-3-methoxyfluorene (mp 161-2°C) and 2-acetamino-3-methoxyfluorene (mp 167-8°C). In order to confirm the structures of the above products, 2-chloro-3-methoxyfluorenone (mp 248-9°C) was synthesized through the route of 2-amino-3-nitrofluorenone, 2-chloro-3-nitrofluorenone (mp 224-5°C), 2-chloro-3-aminofluorenone (mp 212-3°C), and 2-chloro-3-hydroxyfluorenone (mp 238-9°C). It was confirmed that this was identical with the product prepared through the routeof 2-amino-3-methoxyfluorene and 2-chloro-3-methoxyfluorene (mp 136-7°C). Also, absorptionspectra of new 2, 3-disubstituted fluorenes and fluorenones, including 2-chloro-3-hydroxyfluorene (mp 122-3°C) and 2-chloro-3-acetamidofluorenone (mp 222-3°C), were estimated.
