反应详情

温度

60 °C

A mixture of ethyl 3-methyl-7-[(2-thienylsulfonyl)amino]-1H-indole-2-carboxylate (1.33 g), 8N aqueous sodium hydroxide solution (2.0 mL), tetrahydrofuran (5 mL) and ethanol (10 mL) was stirred at 60° C. for 3 hr. The reaction mixture was concentrated, and water was added to the residue. The mixture was acidified with 10% aqueous citric acid solution, and the resulting crystals were filtrated, washed with water, and dried to give the title compound (1.15 g, yield 94%) as colorless crystals. melting point>263° C. (decomposition).

1. concentrationThe reaction mixture was concentrated
2. additionwater was added to the residue
3. filtrationthe resulting crystals were filtrated
4. washwashed with water
5. customdried