反应详情

3-Chloro-4-[2-(2-chloro-pyridin-4-yl)-3,3,3-trifluoro-2-hydroxy-1-methyl-propyl]-phenol (Example 133, 200 mg) and 2-bromo-2-methyl-propionamide (272 mg) in dimethyl acetamide (1 mL) were treated with sodium hydroxide (66 mg) and stirred at r.t. for 17 h. A second portion of 2-bromo-2-methyl-propionamide (272 mg) followed by sodium hydroxide (66 mg) was added and the reaction mixture further stirred for 2 h at r.t. This process was repeated a last time and the reaction mixture was diluted with ice-water (10 mL), neutralized with 1N aqueous HCl, extracted with ethyl acetate (2×), dried over MgSO4 and concentrated in vacuo. The residue was purified by flash chromatography (20 g silica gel, ethyl acetate/heptane 1:2) to give the title compound as off-white waxy solid (170 mg). MS (m/e)=451.0 (MH+).

1. additionwas added
2. stirringthe reaction mixture further stirred for 2 h at r.t
3. extractionextracted with ethyl acetate (2×)
4. dry with materialdried over MgSO4
5. concentrationconcentrated in vacuo
6. customThe residue was purified by flash chromatography (20 g silica gel, ethyl acetate/heptane 1:2)