反应详情

温度

90 °C

To a mixture of 6-(2-fluorophenyl)-3-methyl-4,5,6,7-tetrahydrobenzofuran-4-one (0.21 g) and aminoguanidine hydrochloride (95 mg) were added ethanol (17 ml) and 6N hydrochloric acid (0.074 ml), and the mixture was stirred at 90° C. for 2 hours and cooled. The reaction solution was concentrated under reduced pressure, and the residue was washed with ethanol, ethyl acetate and isopropylether, and dried to give (E)-6-(2-fluorophenyl)-4-guanidinoimino-3-methyl-4,5,6,7-tetrahydrobenzofuran hydrochloride (Compound 40) (0.19 g).

1. temperaturecooled
2. concentrationThe reaction solution was concentrated under reduced pressure
3. washthe residue was washed with ethanol, ethyl acetate and isopropylether
4. customdried