反应详情

To a solution of lithium diisopropylamide (1.8 M, 2.12 mL, 3.81 mmol) in tetrahydrofuran (5 mL) at −78° C. was added a solution of N-[3-methyl-5-(1,3-thiazol-5-yl)phenyl]-4-(trifluoromethyl)pyrimidin-2-amine (INTERMEDIATE 24, 564 mg, 1.68 mmol) in tetrahydrofuran (5 mL) over 8 minutes. After 40 minutes, a solution of (R)—N-(dicyclopropylmethylidene)-2-methylpropane-2-sulfinamide (0.325 g, 1.52 mmol) in tetrahydrofuran (4 mL) was added all at once. After 90 minutes, acetic acid (0.275 mL) was added and the reaction mixture was partitioned between ethyl acetate (45 mL) and saturated aqueous sodium bicarbonate solution (20 mL). The layers were separated and the organic layer was washed with brine (20 mL), dried over sodium sulfate, filtered, and concentrated. Purification of the crude material using silica gel flash chromatography (ethyl acetate/hexanes) yielded (R)—N-{dicyclopropyl[5-(3-methyl-5-{[4-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]methyl}-2-methylpropane-2-sulfinamide (638.6 mg, 1.16 mmol, 76% yield) as a yellow film. MS ESI: [M+H]+ m/z 550.1.

1. waitAfter 90 minutes
2. customthe reaction mixture was partitioned between ethyl acetate (45 mL) and saturated aqueous sodium bicarbonate solution (20 mL)
3. customThe layers were separated
4. washthe organic layer was washed with brine (20 mL)
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification of the crude material