反应详情

5-(3,3-Dimethyl-but-1-ynyl)-3-[(trans-4-hydroxy-cyclohexyl)-(trans-4-methyl-cyclohexanecarbonyl)-amino]-thiophene-2-carboxylic acid (211 mg, 0.46 mmol) in DMF (2 mL) at 0 deg C. was treated with sodium hydride (110 mg, 2.8 mmol, 60% oil dispersion) in portions. The mixture was stirred for 30 minutes at 0 deg C. and a solution of 2,4-dichloropyrimidine (210 mg, 1.4 mmol) in DMF (1 mL) was added dropwise. The reaction mixture was allowed to warm and stir at room temperature. After completion, ethyl acetate (2-3 mL) was added and the mixture was carefully quenched with citric acid (10% aqueous solution, 2-3 mL). Water was added and the mixture was extracted with ethyl acetate (2×30 mL). The combined organic layers were dried over magnesium sulfate, filtered and concentrated. The residue was passed through a plug of silica (0-5% MeOH:DCM eluent) and concentrated to yield 162 mg of 5-(3,3-dimethyl-but-1-ynyl)-3-{(trans-4-methyl-cyclohexanecarbonyl)-[trans-4-(2-chloro-pyrimidin-4-yloxy)-cyclohexyl]-amino}-thiophene-2-carboxylic acid as an impure black oil which was carried on without further purification.

1. customat 0 deg C
2. temperatureto warm
3. stirringstir at room temperature
4. customthe mixture was carefully quenched with citric acid (10% aqueous solution, 2-3 mL)
5. additionWater was added
6. extractionthe mixture was extracted with ethyl acetate (2×30 mL)
7. dry with materialThe combined organic layers were dried over magnesium sulfate
8. filtrationfiltered
9. concentrationconcentrated
10. concentrationconcentrated