Hydrochloric Acid → C,C,C-Trifluoro-N-{3-[6-(5-fluorobenzothiazol-2-ylmethoxy)-2-methyl-4-oxo-4H-chromen-3-ylmethyl]phenyl}methanesulfonamide

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Reaction Steps

To a stirred solution of 1.8 g (4.4 mmole) of the product from Example 126 in 50 mL dimethylformamide was added 2.4 g (17.4 mmole) potassium carbonate. The mixture was stirred at room temperature for 1 hour then 1.2 g (5.72 mmole) 2-(chloromethyl)-5-fluorobenzothiazole was added. The mixture was stirred for 18 hours, poured into water, acidified to ph 1-4 with 1N HCl, and extracted with ethyl acetate. The ethyl acetate extract was washed with water and brine and then dried (MgSO4), and concentrated to give a solid. Trituration with ether afforded 2.45 g (97%) of the title product as a solid, mp 218°-220° C. Analysis calculated for C26H18N2S2O5F4 : C, 53.98; H, 3.14; N, 4.84. Found: C, 53.94; H, 2.91; N, 4.55.

Provenance & Evidence