Sodium Bicarbonate → 1-Amino-6,11-dihydrodibenz[b,e]oxepin-11-one

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Reaction Steps

In concentrated hydrochloric acid (10 ml), 1-acetamido-6,11-dihydrodibenz[b,e]oxepin-11-one obtained in Reference Example 3(0.25 g, 0.94 mmol) was heated under reflux for 2 hours. The reaction mixture was poured into a saturated aqueous solution of sodium bicarbonate, followed by extraction with ethyl acetate (25 ml). The organic layer was washed with a saturated aqueous solution of sodium chloride, and then dried over anhydrous magnesium sulfate. After the drying agent was filtered off, the organic layer was concentrated under reduced pressure to give 1-amino-6,11-dihydrodibenz[b,e]oxepin-11-one as a yellow solid (0.17 g, 81%).

Provenance & Evidence