Sodium Hydroxide → 4-[2,4-Dioxo-3,4-dihydro-1H-naphtho[2,1-b][1,4]diazepin-5(2H)-yl]benzoic acid

Participants

Reaction Steps

Ethyl 4-[2,4-Dioxo-3,4-dihydro-1H-naphtho[2,1-b][1,4]diazepin-5(2H)-yl]benzoate (1.19 g, 3.18 mmol) obtained in Example 102, (3), and 8 N aqueous sodium hydroxide (1.00 mL, 8.00 mmol) were stirred at room temperature in ethanol (10 mL) and water (5 mL). After the disappearance of the starting materials was confirmed, a post-treatment was performed in a conventional manner to obtain the title compound (905 mg, yield 82%).

Provenance & Evidence