反应详情

A solution of 0.137 g (0.776 mmol) of 2,6-difluorobenzoyl chloride in 1 mL of dichloromethane was added dropwise to a mixture of 0.23 g (0.693 mmol) of β-amino-4'-[(difluoromethyl)thio][1,1'-biphenyl]-4-ethanol hydrochloride salt, 1.5 mL of dichloromethane, and 1.5 mL of sodium bicarbonate (saturated aqueous solution). The mixture was stirred for 2 h, and was diluted with 10 mL of water. The mixture was extracted with 3×20 mL of dichloromethane, 35 mL of dichloromethane and the organic phase separated. The combined extracts were dried and evaporated. Chromatography on silica gel (eluted with ethyl acetate/hexane (1:1)) gave the product 0.28 g (93% yield) as a white solid m.p. 156.5-157° C. IR(Nujol): 3294, 1649, 1624, 1589, 1535, 1309, 1233, 1071, 1004, 819 cm-1. 1H-NMR(CDCl3): δ2.15 (t, J=5.75 Hz, 1H), 4.03-4.06 (m, 2H), 5.33-5.37 (m, 1H), 6.81 (d, J=7.2 Hz, 1H), 6.86 (t, J=57 Hz, 1H), 6.94-6.99 (m, 2H), 7.35-7.43 (m, 1H), 7.48 (d, J=8 Hz, 2H), 7.50-7.65 (m, 6H).

1. extractionThe mixture was extracted with 3×20 mL of dichloromethane, 35 mL of dichloromethane
2. customthe organic phase separated
3. customThe combined extracts were dried
4. customevaporated