反应详情

While stirring a mixture of 35 g of 2-bromo-3-methoxymethyloxypyridine, 5 g of 1,3-bis(diphenylphosphino)propanenickel (II) chloride and 200 ml of tetrahydrofuran under ice-cooling, a diethyl ether solution of benzylmagnesium bromide prepared from 38 ml of benzyl bromide, 8 g of magnesium and 250 ml of anhydrous diethyl ether was slowly added dropwise thereinto under nitrogen atmosphere. After stirring for 4.5 hours, a saturated aqueous ammonium chloride solution was added thereto, and the mixture was extracted with ethyl acetate. The organic layer was washed with brine and dried over anhydrous sodium sulfate. The solvent was removed, and the residue was purified by silica gel column chromatography (8–20% ethyl acetate/hexane), to give 27 g of the title compound.

1. temperaturecooling
2. additionwas slowly added dropwise
3. stirringAfter stirring for 4.5 hours
4. extractionthe mixture was extracted with ethyl acetate
5. washThe organic layer was washed with brine
6. dry with materialdried over anhydrous sodium sulfate
7. customThe solvent was removed
8. customthe residue was purified by silica gel column chromatography (8–20% ethyl acetate/hexane)