反应详情

To a solution of 4-(4-formyl-2-thiazolyl)-1-[[5-methyl-3-(trifluoromethyl)-1H-pyrazol-1-yl]acetyl]piperidine (i.e. the product of Example 8, Step B) (0.8 g, 2.07 mmol) in ethyl alcohol (15 mL) was added hydroxylamine (50% aqueous solution, 0.136 g, 4.1 mmol) and the reaction mixture was stirred at room temperature for 10 minutes. The reaction mixture was concentrated under reduced pressure to give a yellow oil, which was purified by flash column chromatography on silica gel using 50% ethyl acetate in hexanes as eluant to give 0.7 g of the title compound as a white solid. This compound can be used as an intermediate to make compounds of the invention (via alkylation of the hydroxyimino group).

1. concentrationThe reaction mixture was concentrated under reduced pressure
2. customto give a yellow oil, which
3. customwas purified by flash column chromatography on silica gel using 50% ethyl acetate in hexanes as eluant