反应详情

In 200 ml of anhydrous diethyl ether was dissolved 24.0 g of ethyl(E)-3-[4-(pyridin-3-ylmethyl)phenyl]acrylate, and thereto was added in small portions 2.4 g of lithium aluminum hydride with ice-cooling over one hour. The resulting mixture was subjected to reaction for one hour with ice-cooling and then for a further one hour at room temperature, after which 91 ml of hydrous tetrahydrofuran (water content: 10% by volume) was added in small portions. Insolubles were removed by filtration and the solvent was removed by distillation under reduced pressure. The resulting oily product was dissolved in 200 ml of chloroform, and 40 ml of water was added to the resulting solution, after which the pH thereof was adjusted to 7 with 2N hydrochloric acid. The organic layer was separated, washed successively with 50 ml of water and 50 ml of a saturated aqueous sodium chloride solution, and then dried over anhydrous sodium sulfate, after which the solvent was removed by distillation under reduced pressure. The residue thus obtained was purified by a column chromatography [Wako Silica Gel C-200, eluant: benzene:ethyl acetate (1:1 by volume)] to obtain 10.5 g (yield 52.0%) of colorless, oily (E)-3-[4-(pyridin-3-ylmethyl)phenyl]allyl alcohol. This was crystallized from a mixed solvent of chloroform and diethyl ether to obtain colorless needle crystals having a melting point of 81°-82° C.

1. temperaturecooling over one hour
2. customThe resulting mixture was subjected to reaction for one hour with ice-
3. temperaturecooling
4. customInsolubles were removed by filtration
5. customthe solvent was removed by distillation under reduced pressure
6. dissolutionThe resulting oily product was dissolved in 200 ml of chloroform
7. addition40 ml of water was added to the resulting solution
8. customThe organic layer was separated
9. washwashed successively with 50 ml of water and 50 ml of a saturated aqueous sodium chloride solution
10. dry with materialdried over anhydrous sodium sulfate
11. customafter which the solvent was removed by distillation under reduced pressure
12. customThe residue thus obtained
13. customwas purified by a column chromatography [Wako Silica Gel C-200, eluant: benzene:ethyl acetate (1:1 by volume)]