Methanesulfonyl chloride → N-[3-fluoro-4-(4-fluorophenyl)-2,2-dimethyl-2H-chromen-7-yl]methanesulfonamide

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Reaction Steps

Under ice-cooling, pyridine (4 mL) and Methanesulfonyl chloride (60 μL) were added dropwise to a solution of [3-fluoro-4-(4-fluorophenyl)-2,2-dimethyl-2H-chromen-7-yl]amine (a compound of Reference Example 7(7), 105 mg) in pyridine (4 mL) and the mixture was stirred at room temperature for 2 hours. The reaction solution was concentrated in vacuo, the residue was diluted with ethyl acetate, and the solution was washed successively with a saturated aqueous solution of citric acid, water, a saturated aqueous solution of sodium bicarbonate and brine. The organic layer was filtered through a column of porous diatomite (Chem Elut), and the filtrate was concentrated in vacuo. The resultant residue was purified by column chromatography on NH-silica gel (Chromatorex NH-silica gel, Solvent: chloroform/methanol=100/0 to 90/10) to give the titled compound (105 mg) as a colorless powder.

Provenance & Evidence