4-Toluenesulfonyl chloride → HCID 67468537, compound

Participants

Reaction Steps

To a suspension of 4-(3-aminophenyl)-1-(2-phenoxyethyl) 4-fluoropiperidine dihydrochloride (100 mg, 0.26 mmol) in methylene chloride (5 mL) was added diisopropylethylamine (118 mg, 0.91 mmol) and the mixture stirred at room temperature until a clear solution resulted. This solution was then cooled to 0° C. and 4-methyl-benzenesulfonyl chloride (58 mg, 0.28 mmol) was then added and the reaction stirred at 0° C. for 1 hour then room temperature for 3 hours. After this time the mixture was quenched by the addition of 25% ammonium chloride solution (10 mL). The organic layer was separated and the aqueous extracted with ethyl acetate (2×10 mL). The combined extracts were dried over magnesium sulfate and filtered and concentrated. The residue was re-dissolved in ethyl acetate (20 mL), washed with water (2×10 mL) and brine (10 mL), dried over magnesium sulfate and filtered. The filtrate was concentrated to a viscous yellow oil which was treated with 10% methanolic hydrogen chloride (10 mL) and re-concentrated. The residue was triturated with ethyl acetate (5 mL) and then dried under high vacuum to afford a 49% yield of the title compound as a light yellow solid.

Provenance & Evidence