反应详情

温度

-78 °C

4-(5-chloropyridin-3-yl)-3-[(trans-4-methylcyclohexyl)methyl]-3H-imidazo[4,5-c]pyridine-6-carbonitrile (Preparative Example 3.1, Step 2) (350 mg, 0.95 mmol) was dissolved in THF (10 mL) and cooled to −78° C. 2,2,6,6-tetramethylpiperidinylmagnesium chloride lithium chloride complex (Aldrich, 1M in THF/toluene) (2.0 mL, 2.0 mmol) was added slowly to the solution at −78° C. The reaction was stirred at −78° C. for 2 hours. Then methoxyacetone (168 mg, 2.0 mmol) was added into the reaction mixture at −78° C. The reaction was allowed to warm to room temperature and stirred for 8 hours under a nitrogen atmosphere. The reaction was quenched with saturated NH4Cl solution (5 mL) at −78° C. and extracted with EtOAc (2×10 mL). The combined organic layers were dried over anhydrous Na2SO4, filtered, and concentrated under reduced pressure. The residue was purified on a silica gel column (0 to 100% EtOAc/hexanes) to afford 4-(5-chloropyridin-3-yl)-2-(2-hydroxy-1-methoxypropan-2-yl)-3-[(trans-4-methylcyclohexyl)methyl]-3H-imidazo[4,5-c]pyridine-6-carbonitrile. MS APCl calcd. for C24H28ClN5O2 [M+H]+ 454. found 454.

1. temperatureto warm to room temperature
2. stirringstirred for 8 hours under a nitrogen atmosphere
3. customThe reaction was quenched with saturated NH4Cl solution (5 mL) at −78° C.
4. extractionextracted with EtOAc (2×10 mL)
5. dry with materialThe combined organic layers were dried over anhydrous Na2SO4
6. filtrationfiltered
7. concentrationconcentrated under reduced pressure
8. customThe residue was purified on a silica gel column (0 to 100% EtOAc/hexanes)