反应详情

温度

80 °C

Tolvaptan (1.0 g, 2.2 mmol) was suspended in toluene (7 ml). 2-Chloroethyl isocyanate (0.28 ml, 3.3 mmol) and 4-dimethylaminopyridine (DMAP) (27 mg, 0.22 mmol) were added thereto, and the mixture was stirred at 80° C. for 24 hours. After cooling to room temperature, the insoluble materials were filtered off and washed with ethyl acetate. The filtrate was concentrated under reduced pressure. The residue was purified by silica gel flash chromatography (n-hexane:ethyl acetate=54:46→33:67). The purified product was concentrated under reduced pressure to obtain 1.0 g of {7-chloro-1-[2-methyl-4-(2-methyl-benzoylamino)-benzoyl]-2,3,4,5-tetrahydro-1H-benzo[b]azepin-5-yl}(2-chloroethyl)carbamate as white amorphous solid.

1. temperatureAfter cooling to room temperature
2. filtrationthe insoluble materials were filtered off
3. washwashed with ethyl acetate
4. concentrationThe filtrate was concentrated under reduced pressure
5. customThe residue was purified by silica gel flash chromatography (n-hexane:ethyl acetate=54:46→33:67)
6. concentrationThe purified product was concentrated under reduced pressure