反应详情

In 50 ml of ethylene glycol was dissolved 5.0 g of potassium tert-butoxide, and a mixed solution of 6 ml of N,N-dimethylformamide and 5.0 g of 3-[p-(3-chloro-2-methylpropionyl)benzyl]pyridine was added in small portions to the above solution with ice-cooling, after which the resulting mixture was subjected to reaction at the same temperature for 2 hours, and then neutralized with 9 ml of 2N hydrochloric acid and diluted with 50 ml of water. The resulting mixture was extracted with two 50-ml portions of methylene chloride. The extracts were combined, washed with water, and then dried over anhydrous magnesium sulfate. The solvent was removed by distillation under reduced pressure, and the residue thus obtained was purified by a column chromatography [Wako Silica Gel C-200, eluant: chloroform:ethyl acetate (1:3 by volume)] to obtain 5.63 g (yield 85.8%) of colorless, oily 3-[p-[3-(2-hydroxyethyl)oxy-2-methylpropionyl]benzyl]pyridine.

1. temperaturecooling
2. customafter which the resulting mixture was subjected to reaction at the same temperature for 2 hours
3. extractionThe resulting mixture was extracted with two 50-ml portions of methylene chloride
4. washwashed with water
5. dry with materialdried over anhydrous magnesium sulfate
6. customThe solvent was removed by distillation under reduced pressure
7. customthe residue thus obtained
8. customwas purified by a column chromatography [Wako Silica Gel C-200, eluant: chloroform:ethyl acetate (1:3 by volume)]