Benzyl Bromide → 2-Benzyl-6-(3,3-ethylenedioxypyrrolidin-1-yl)pyridine

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A mixture of 6.3 g of 2-bromo-6-(3,3-ethylenedioxypyrrolidine-1-yl)pyridine, 240 mg of 1,3-bis (diphenylphosphino)propanenickel (II) chloride and 20 ml of tetrahydrofuran was stirred in an ice bath in a nitrogen atmosphere. Into the mixture were added dropwise a diethyl ether solution of benzyl magnesium bromide prepared from 3.4 ml of benzyl bromide, 0.8 g of magnesium and 15 ml of diethyl ether, followed by stirring at room temperature overnight as it was. The reaction solution was partitioned between an aqueous saturated ammonium chloride solution and ethyl acetate. The organic phase was washed with brine, dried over anhydrous magnesium sulfate and then concentrated. The residue was subjected to silica gel column chromatography using 5-10% ethyl acetate/hexane, to give 6.6 g of the target compound.

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