1,3-Isobenzofurandione, 5-fluoro- → 9,9-Bis{4-(4-fluorophthalimido)phenyl}fluorene

Participants

Reaction Steps

A mixture of 9,9-bis(4-aminophenyl )fluorene (17.4 g, 50 mmol), 4-fluorophthalic anhydride (18.3 g, 110 mmol), and 250 ml of acetic acid was stirred and heated under reflux for five hours and then stirred at ambient temperature overnight. A colorless precipitate formed which was filtered, washed twice with 150 ml of ethanol, washed twice with 100 ml of hexane, suction-dried for two hours, and then dried in a vacuum oven at 120° C. for 16 hours. The title compound was isolated as a colorless powder (29.2 g, 90.6% yield) that had melting point of 323.5°-326° C. and a 1H NMR spectrum (DMSO-d6) corresponding to δ8.02 (m, 4H), 7.86 (dd, 2H), 7.72 (m, 2H), 7.60 (d, 2H), 7.46 (t, 2H), and 7.35 (m, 10H).

Provenance & Evidence