(4S)-(4-methyl-2,5-dioxoimidazolidin-4-yl)methanesulphonyl chloride → (5S)-5-Methyl-5-[({4-[4-(2,2,3,3,3-pentafluoropropoxy)phenoxy]-piperidin-1-yl}sulphonyl)methyl]imidazolidine-2,4-dione

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Reaction Steps

[(4S)-4-methyl-2,5-dioxoimidazolidin-4-yl]methanesulphonyl chloride (0.188 g) was added to a solution of 4-{4-(2,2,3,3,3-pentafluoropropoxy)phenoxy]-piperidine hydrochloride (0.30 g) in dichloromethane (10 ml) and triethylamine (0.70 ml) at ambient temperature. Stirred for 16 hours and evaporated to dryness. The residue was purified by prep HPLC (using λ230 nm as the detecting wavelength) eluting with 0-95% acetonitrile, H2O, +0.2% trifluoroacetic acid. Yielded a solid product, which was dried under vacuum at 50° C. to give the title compound (0.076 g). NMR: (DMSOd6) δ 10.7 (s, 1H), 8.0 (s, 1H), 7.0 (m, 4H), 4.75 (t, 2H), 4.45 (m, 1H), 3.5 (d, 1H), 3.3 (m, 3H), 3.1 (m, 2H), 1.95 (m, 2H), 1.7 (m, 2H), 1.35 (s, 3H). Mass Spectrum: M−H− 513.

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