反应详情

A stirred mixture of 3′-[4-trifluoromethyl-6-(4-trifluoromethyl-phenyl)-pyrimidin-2-yl]-biphenyl-3-sulfonic acid 2,2-dimethyl-propyl ester (1.42 g, 2.39 mmol), 2M sodium propanolate solution (3 ml, 6 mmol), 2-(diethylamino)-ethanthiol (0.37 g, 2.75 mmol) and dioxane (15 ml) was heated under reflux conditions for 24 h and evaporated. Water (40 ml) was added and the mixture was extracted with ethyl acetate (2×50 ml). The combined organic layers were washed with water (50 ml). The water layers were combined, acidified with 2N HCl and extracted with ethyl acetate (2×50 ml). The latter two organic layers were combined, washed with brine (50 ml), dried (MgSO4) and evaporated to yield the crude 3′-[4-trifluoromethyl-6-(4-trifluoromethyl-phenyl)-pyrimidin-2-yl]-biphenyl-3-sulfonic acid as a brown solid (0.91 g, 51%). Thionyl chloride (20 ml) and DMF (4 drops) were added and the stirred mixture was heated under reflux conditions for 4 h, evaporated and purified by flash chromatography on silica gel (ethyl acetate/heptane) to yield the title compound as a light brown solid (0.43 g, 33%). MS (ISP) 542.2 [(M)+]; mp 176° C.

1. temperaturewas heated under reflux conditions for 24 h
2. customevaporated
3. additionWater (40 ml) was added
4. extractionthe mixture was extracted with ethyl acetate (2×50 ml)
5. washThe combined organic layers were washed with water (50 ml)
6. extractionextracted with ethyl acetate (2×50 ml)
7. washwashed with brine (50 ml)
8. dry with materialdried (MgSO4)
9. customevaporated