Water → 3-[p-(3-Chloro-2-methylpropionyl)benzyl]pyridine

Beteiligte Stoffe

Reaktionsschritte

In 25 ml of methylene chloride was suspended 13.3 g of anhydrous aluminum chloride, and 7.3 g of 3-chloro-2-methylpropionyl chloride was added to the suspension with ice-cooling, after which 8.2 g of 3-benzylpyridine hydrochloride was added in small portions to the suspension. The resulting mixture was subjected to reaction with ice-cooling for 2 hours and then at room temperature for one hour. The reaction mixture was added in small portions to a mixture of 246 ml of iced water and 49 ml of methylene chloride, and the organic layer was separated, while the aqueous layer was extracted with 40 ml of methylene chloride. The organic layers were combined and then 80 ml of water was added thereto after which the resulting mixture was neutralized with sodium hydrogencarbonate. The organic layer was separated, washed with 50 ml of water, and thereafter 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 (1:1 by volume)] to obtain 10.53 g (yield 96.0%) of colorless, oily 3-[p-(3-chloro-2-methylpropionyl)benzyl]pyridine.

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