反应详情

温度

-78 °C

To diisopropyl amine (318 μL, 2.23 mmol) in tetrahydrofuran (3.7 mL) at 0° C. was added N-butyllithium (2.5 M in hexanes, 892 μL, 2.23 mmol). The mixture was stirred for 15 minutes, then cooled to −78° C. INTERMEDIATE 4 (250 mg, 0.74 mmol) dissolved in tetrahydrofuran (1 mL) was added dropwise over 5 minutes. The mixture was stirred for 30 minutes at −78° C., then the product of Step 1 (212 mg, 0.82 mmol) dissolved in tetrahydrofuran (1 mL) was added dropwise. The reaction mixture was stirred for 2 h, and then quenched with saturated aqueous ammonium chloride, extracted with ethyl acetate (3×), and the combined organic fractions were dried over sodium sulfate, filtered, and concentrated. Purification by column chromatography on silica gel (0:100 to 80:20 ethyl acetate:hexanes gradient, then 0:100 to 15:85 methanol:dichloromethane gradient) afforded 2-methyl-N-{8-[5-(3-methyl-5-{[4-(trifluoromethyl)pyrimidin-2-yl]amino}phenyl)-1,3-thiazol-2-yl]-1,4-dioxaspiro[4.5]dec-8-yl}propane-2-sulfinamide (318 mg, 0.40 mmol, 75% yield) as a brown solid. MS ESI: [M+H]+ m/z 596.

1. additionwas added dropwise over 5 minutes
2. stirringThe mixture was stirred for 30 minutes at −78° C.
3. additionwas added dropwise
4. stirringThe reaction mixture was stirred for 2 h
5. customquenched with saturated aqueous ammonium chloride
6. extractionextracted with ethyl acetate (3×)
7. dry with materialthe combined organic fractions were dried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated
10. customPurification by column chromatography on silica gel (0:100 to 80:20 ethyl acetate