Trifluoroacetic acid → 3'-[4-(5-Chloro-thiophen-2-yl)-6-trifluoromethyl-pyrimidin-2-yl]-biphenyl-3-sulfonic acid amide

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Reaction Steps

To a cooled and stirred solution of 3′-[4-(5-chloro-thiophen-2-yl)-6-trifluoromethyl-pyrimidin-2-yl]-biphenyl-3-sulfonic acid tert-butylamide (0.22 g) in dichloromethane (5 ml) was added TFA (5 ml) and the reaction mixture was allowed to stir at room temperature for 15 h. The mixture was evaporated, poured into saturated NaHCO3 solution (20 ml) and extracted with ethyl acetate (2×30 ml). The combined organic layers were washed with brine (20 ml), dried (MgSO4) and evaporated. Further purification by flash chromatography on silica gel (ethyl acetate/heptane) and crystallization (MeOH) yielded the title compound as a light yellow solid (0.13 g, 27%). MS (ISN) 494.3 [(M−H)−]; mp 226.5° C.

Provenance & Evidence