Water → 1-Benzenesulfonyl-5-methanesulfonylindole-2-carboxylic acid methyl ester

Participants

Reaction Conditions

Reaction Steps

To a mixture of the compound obtained in Example 22 (1) (3.4 g), tetrahydrofuran (90 ml) and water (45 ml), OXONE (registered trademark) (8.7 g) was added at 0° C. and the mixture was stirred for 20 minutes and at 15 to 30° C. for 1 hour. The mixture was diluted with ethyl acetate. The organic layer was washed with water and dried over sodium sulfate. The solvent was distilled off under reduced pressure to obtain 3.5 g of a white amorphous 1-benzenesulfonyl-5-methanesulfonylindole-2-carboxylic acid methyl ester as a crude product, which was used in the next reaction without further purification.

Provenance & Evidence