Tetrahydrofuran → 7-[methyl(2-thienylsulfonyl)amino]-1H-indole-2-carboxylic acid

関与物質

反応条件

反応手順

A mixture of ethyl 7-[methyl(2-thienylsulfonyl)amino]-1H-indole-2-carboxylate (0.40 g), 8N aqueous sodium hydroxide solution (0.40 mL), tetrahydrofuran (5 mL) and methanol (5 mL) was stirred at 60° C. for 1 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 (0.35 g, yield 91%) as colorless crystals. melting point>240° C. (decomposition).

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