反应详情

To a stirring solution of 139 mg (1.01 mmol) of 4-isopropylpyridine N-oxide in 10 mL of CH2Cl2 at r.t. was added 160 μL (1.20 mmol) of TMSCN. After 5 min., 100 μL (1.09 mmol) of dimethylcarbamyl chloride was added, and the solution was stirred at r.t. for 16 h. The solution was diluted with chloroform and washed with 20 mL of 10% aqueous K2CO3. The layers were separated, and the aqueous layer was extracted 3 times with CHCl3. The combined extracts were dried over Na2SO4, filtered, and concentrated. Purification by flash silica gel chromatography (30% EtOAc/hexanes) provided 4-isopropylpicolinonitrile with some impurity as a liquid.

1. washwashed with 20 mL of 10% aqueous K2CO3
2. customThe layers were separated
3. extractionthe aqueous layer was extracted 3 times with CHCl3
4. dry with materialThe combined extracts were dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification by flash silica gel chromatography (30% EtOAc/hexanes)