反应详情

To a cooled (0° C.) THF (5 mL) solution of 5-(3,3-Dimethyl-but-1-ynyl)-3-[4-(pyridin-2-yloxy)-phenylamino]-thiophene-2-carboxylic acid methyl ester (0.225 g, 0.55 mmol) was first added KHMDS (0.66 mmol, 0.5 M in toluene), followed by neat trans-4-methyl-cyclohexanecarbonyl chloride (0.132 g, 0.825 mmol). The reaction was warmed slowly to room temperature and quenched with saturated ammonium chloride solution. The reaction mixture was diluted with EtOAc, washed with water, brine, dried over sodium sulfate, filtrated and concentrated. The crude material was purified by silica gel column chromatography to give 5-(3,3-dimethyl-but-1-ynyl)-3-{(4-methyl-cyclohexanecarbonyl)-[4-(pyridin-2-yloxy)-phenyl]-amino}-thiophene-2-carboxylic acid methyl ester in 60% yield.

1. customquenched with saturated ammonium chloride solution
2. additionThe reaction mixture was diluted with EtOAc
3. washwashed with water, brine
4. dry with materialdried over sodium sulfate
5. filtrationfiltrated
6. concentrationconcentrated
7. customThe crude material was purified by silica gel column chromatography