反应详情

At ambient temperature, 150 mg (0.545 mmol) of 1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]propan-2-amine, 116 mg (0.60 mmol) of 3-(difluoromethyl)-5-fluoro-1-methyl-1H-pyrazole-4-carboxylic acid, 81 mg (0.60 mmol) of 1-hydroxybenzotriazole and 55 mg (0.545 mmol) of triethylamine are stirred together in 1 ml of dimethylformamide until dissolution. This solution is pourred over a 2 g-containing basic alumina Chem-Elut™ cartridge packed with 1.48 g of Si-DCC resin (1.09 mmol of DCC per g of resin) and left overnight at ambient temperature. The cartridge is then washed three times by 2 ml of acetonitrile. The solvents are removed and the crude amide is purified by column chromatography on silica gel (gradient heptane/ethyl acetate) to yield 187 mg (78% yield) of N-{1-[3-chloro-5-(trifluoromethyl)pyridin-2-yl]propan-2-yl}-3-(difluoromethyl)-5-fluoro-1-methyl-1H-pyrazole-4-carboxamide as yellow solid (M+H=415).

1. additioncontaining basic alumina Chem-Elut™ cartridge
2. washThe cartridge is then washed three times by 2 ml of acetonitrile
3. customThe solvents are removed
4. customthe crude amide is purified by column chromatography on silica gel (gradient heptane/ethyl acetate)