Sodium Hydroxide → 1-(5-chloro-1H,3H-benzo[de]isochromen-6-yl)-ethylidene-amine

Participants

Reaction Conditions

Reaction Steps

5-Chloro-1H,3H-benzo[de]isochromen-6-carbonitrile (20 g, 87.08 mmol) obtained in Step 5 of Example 71 was suspended in anhydrous toluene (100 mL) under nitrogen atmosphere, and 2 M trimethyl aluminum-toluene solution (218 mL, 435 mmol) was added at room temperature. The obtained solution was stirred while heating in a 105° C. oil bath for 12 hours. The reaction solution was cooled to room temperature, and then slowly poured into an aqueous solution of potassium sodium (+)-tartarate tetrahydrate (184 g). 2 N aqueous sodium hydroxide solution (250 mL) was additionally added, and after stirring for 30 minutes, this was extracted with ethyl acetate (500 mL). The separated organic layer was washed with water (300 mL) and brine, then dried over anhydrous sodium sulfate, filtered, concentrated, and thus, 1-(5-chloro-1H,3H-benzo[de]isochromen-6-yl)-ethylidene-amine (22 g) was obtained as an orange-colored oil like substance.

Provenance & Evidence