反应详情

4-Mercapto-thiazole-5-carboxylic acid methyl ester (0.41 g, 2.16 mmol) is dissolved in DMF (6 ml) and triethylamine (0.45 ml, 3.24 mmol) and 1-(3-bromo-1,1-difluoro-propyl)-4-fluoro-benzene (synthesized according to the methods described in sections a) to e) of example 1) (0.55 g, 2.16 mmol) are added successively. The resulting mixture is stirred at RT for 16 h. After completion of the reaction, the mixture is poured onto water (20 ml) and extracted with EtOAc (3×30 ml). The combined organic layers are washed with brine (20 ml), dried over sodium sulfate and concentrated to dryness. The crude is purified by column chromatography (silica gel, 20% EtOAc/hexane) yielding 4-[[3,3-difluoro-3-(4-fluorophenyl)-propyl]sulfanyl]-thiazole-5-carboxylic acid methyl ester (0.42 g, 1.2 mmol, 56%).

1. additionare added successively
2. customAfter completion of the reaction
3. additionthe mixture is poured onto water (20 ml)
4. extractionextracted with EtOAc (3×30 ml)
5. washThe combined organic layers are washed with brine (20 ml)
6. dry with materialdried over sodium sulfate
7. concentrationconcentrated to dryness
8. customThe crude is purified by column chromatography (silica gel, 20% EtOAc/hexane)