Acetic Acid → HCID 70110373, compound

Participants

Reaction Steps

1 g (5.2 mmol) of 5H-dibenz(b,f)azepine was suspended in 40 ml of dry ether and 9.7 ml (15.5 mmol) of a 1.6M solution of n-butyllithium in hexane was dropped thereinto under stirring at room temperature. After 24 hours, the reaction mixture was cooled in a dry ice-acetone bath and 2 ml of a solution of 0.93 g (7.8 mmol) of isobutyl nitrate in dry ether was dropped thereinto. After stirring at room temperature for 30 minutes, 2 ml of acetic acid was added thereto. Then the reaction mixture was poured into 50 ml of water and extracted with ethyl acetate. The organic layer was washed with water, dried over magnesium sulfate and concentrated. Then the residue was purified by silica gel column chromatography to thereby give 4-nitro-5H-dibenz(b,f)azepine. This product was dissolved in 50 ml of tetrahydrofuran and 1 g of zinc dust was added. Under stirring, conc. hydrochloric acid was dropped thereinto. When the reaction mixture turned from reddish brown into pale yellow, the addition was ceased and the formed insoluble matters were filtered off. The filtrate was made basic by adding diluted aqueous ammonia and then extracted with ethyl acetate. The organic layer was washed with water, dried over magnesium sulfate and concentrated and the residue was purified by silica gel column chromatography. Thus 45 mg of the title compound was obtained.

Provenance & Evidence