反应详情

温度

60 °C

A mixture of ethyl 6-chloro-7-[methyl(2-thienylsulfonyl)amino]-1H-indole-2-carboxylate (0.74 g), 4N aqueous sodium hydroxide solution (1.2 ml), tetrahydrofuran (6 ml) and methanol (4 ml) was stirred at 60° C. for 2 hr. The reaction mixture was concentrated, and acidified with 10% aqueous citric acid solution, and the resulting crystals were collected by filtration, washed with water, and dried to give the title compound (0.69 g, quantitative) as colorless crystals. melting point 286-288° C.

1. concentrationThe reaction mixture was concentrated
2. filtrationthe resulting crystals were collected by filtration
3. washwashed with water
4. customdried