Water → (7Z)-N-[(2S)-2-(4-fluorophenyl)-2-hydroxyethyl]-7-hydroxyimino-N-methyl-5,6-dihydro-4H-1-benzothiophene-3-sulfonamide

Participants

Reaction Conditions

Reaction Steps

To a solution of N-[(2S)-2-(4-fluorophenyl)-2-hydroxyethyl]-N-methyl-7-oxo-4,5,6,7-tetrahydro-1-benzothiophene-3-sulfonamide (the compound of Preparation Example 49) (370 mg) in ethanol (4 mL) and water (2 mL) was added hydroxylamine.hydrochloride (100 mg) and sodium acetate (118 mg). After heating at 50° C. for 4 hours, the reaction solution was cooled to room temperature, the solution was dilued with water and extracted with ethyl acetate, and then was washed with saturated sodium chloride water. The crude product that was obtained after drying the solution with anhydrous sodium sulfate and removing the solvent by evaporation was purified by silica gel column chromatography (ethyl acetate/hexane; ethyl acetate 10–40%), fraction that was eluted with a solvent of higher polarity (the fractions that demonstrated low Rf values) was collected, and the title compound (280 mg) was obtained as a colorless solid. The NMR data of the present compound were consistent with those described in Example 1

Provenance & Evidence