Phenyl Isothiocyanate → 1-[4-(2,4-Dioxo-1,2,3,4-tetrahydronaphtho[1,2-b][1,4]diazepin-5-yl)phenyl]-3-phenylthiourea

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Reaction Steps

5-(4-Aminophenyl)-1H-naphtho[1,2-b][1,4]diazepine-2,4(3H,5H)-dione (190 mg, 0.6 mmol) obtained in Example 1, (3), phenyl isothiocyanate (243 mg, 1.8 mmol), and tetrahydrofuran (76 mL) were mixed, and the mixture was refluxed by heating for 24 hours. After the mixture was left to cool to room temperature, the insoluble matter was removed by filtration, and the filtrate was concentrated under reduced pressure. The residue was purified by silica gel column chromatography (methanol/chloroform=1/50) to obtain the title compound (114 mg, yield 42%) as slightly yellow crystals.

Provenance & Evidence