反应详情

温度

0 °C

To a solution of cyclohexanecarbonitrile (0.913 g, 8.36 mmol) in toluene (25 ml) at 0° C. was added sodium bis(trimethylsilyl)amide (1M solution in THF, 10.0 ml, 10.0 mmol) and the resulting mixture was stirred for 1 hr at 0° C. 2-Chlorothiazole (1 g, 8.36 mmol) was then added dropwise as a solution in toluene (0.5 mL) over a period of 5 minutes and the resulting mixture was allowed to warm up from 0° C. to room temperature over 16 hrs. The reaction mixture was quenched with saturated aqueous NH4Cl (20 mL), and extracted with EtOAc (2×50 mL). The combined organic layers were washed with brine (60 mL, dried (Na2SO4), filtered and concentrated under reduced pressure. The residue was purified by column chromatography on silica (gradient elution 2% to 12% EtOAc in Hexanes) to afford 1-(1,3-thiazol-2-yl)cyclohexanecarbonitrile (686 mg, 3.57 mmol, 42.7% yield) as a pale yellow oil which solidified upon standing. MS ESI: [M+H]+ m/z 193.

1. temperatureto warm up from 0° C. to room temperature over 16 hrs
2. customThe reaction mixture was quenched with saturated aqueous NH4Cl (20 mL)
3. extractionextracted with EtOAc (2×50 mL)
4. washThe combined organic layers were washed with brine (60 mL
5. dry with materialdried (Na2SO4)
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified by column chromatography on silica (gradient elution 2% to 12% EtOAc in Hexanes)