Hydrochloric Acid → N-[4-Methoxy-3-(1-propyl-pyrrolidin-3-yl)-phenyl]-3-trifluoromethoxybenzenesulfonamide

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Reaction Steps

N-[4-Methoxy-3-(1-propionyl-pyrrolidin-3-yl)-phenyl]-3-trifluoromethoxy-benzenesulfonamide (0.19 g, 0.4 mmol) were dissolved in 15 ml tetrahydrofurane and 2 ml 1 M boranetetrahydrofuran complex in tetrahydrofurane was added dropwise. The reaction mixture was heated to reflux for 30 minutes, 2 ml of 2 N aqueous hydrochloric acid was added and the mixture was refluxed again for 3 h. After stirring for 16 h at room temperature, the solvent was evaporated, the residue was treated with water and the pH was adjusted to alkaline pH with 1 N aqueous NaOH. The aqueous layer was extracted twice with diethylether, the combined organic layers were dried over magnesium sulfate, filtered and the solvent was evaporated. The crude product was chromatographed on a chromabond column using 0-5% dichloromethane/methanol as eluent, to yield 0.077 mg of the title compound.

Provenance & Evidence