反应详情

A mixture of 4-[2-chloromethyl-4-phenyloxazol-5-yl]benzenesulfonamide (Step 3) (0.5 g, 1.4 mmol), potassium carbonate (0.4 g, 2.8 mmol), dimethylformamide (20 mL), and 3-fluoro-5-(4-methoxy-3,4,5,6-tetrahydro-2H-pyran-4-yl)phenol [prepared as described in J. Med Chem., 35, 2600-2609 (1992)] (0.3 g, 1.4 mmol) was stirred at room temperature for 16 h. Water (20 mL) was added, and the mixture was extracted with ethyl acetate (4×30 mL). The combined organic layers were washed with brine, dried over magnesium sulfate and concentrated. The resulting crude product was purified by flash column chromatography on silica gel eluting with 50% ethyl acetate in hexanes to give 0.3 g (40%) of 4-[2-[[3-fluoro-5-(3,4,5,6-tetrahydro-4-methoxy-pyran-4-yl)phenoxy]methyl]-4-phenyl-oxazol-5-yl]benzenesulfonamide as a sticky white solid: m.p. 70-80° C. 1H NMR (CDCl3/300 MHz) δ 7.92 (d, 2H, J=8.9 Hz), 7.77 (d, 2H, J=8.9 Hz) , 7.62 (m, 2H) , 7.43 (m, 3H) , 6.94 (s, 1H), 6.78 (m, 2H) 5.24 (s, 2H) , 4.82 (bs, 2H), 3.82 (m, 4H), 3.00 (s, 3H), 1.95 (m, 4H). Anal. calcd for C28H27FN2O6S: C, 62.44; H, 5.05; N, 5.20. Found: C, 62.50; H, 5.11; N, 5.24.

1. extractionthe mixture was extracted with ethyl acetate (4×30 mL)
2. washThe combined organic layers were washed with brine
3. dry with materialdried over magnesium sulfate
4. concentrationconcentrated
5. customThe resulting crude product was purified by flash column chromatography on silica gel eluting with 50% ethyl acetate in hexanes