反应详情

1.74 g (4.21 mmol) of ethyl 4-(2-chlorophenyl)-2-{[5-(trifluoromethyl)-2H-tetrazol-2-yl]methyl}pyrimidine-5-carboxylate were dissolved in 12 ml of ethanol and 45% strength aqueous sodium hydroxide solution (5.05 mmol) was added dropwise at 0° C. The reaction was stirred for a further hour and warmed to RT. The ethanol was then removed under reduced pressure, and ice-water (10 ml) was added to the residue. The aqueous phase was extracted with ethyl acetate. The organic phase was discarded. Then the aqueous phase was adjusted to a pH of 3 using hydrochloric acid, and again extracted with ethyl acetate (3×20 ml). The combined organic phases were dried over sodium sulphate. (logP: 2.50; MH+: 385; 1H-NMR (400 MHz, DMSO, ppm): 6.59 (s, 2H), 7.48 (m, 4H), 9.27 (s, 1H).

1. customThe ethanol was then removed under reduced pressure, and ice-water (10 ml)
2. additionwas added to the residue
3. extractionThe aqueous phase was extracted with ethyl acetate
4. extractionagain extracted with ethyl acetate (3×20 ml)
5. dry with materialThe combined organic phases were dried over sodium sulphate