Triphenylphosphine dibromide → HCID 59694328, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 0.5 g of 2,6-dibromo-4-(hydroxymethyl)pyridine in 7 ml of dichloromethane is added dropwise to a solution of 0.95 g of dibromotriphenylphosphorane in 5 ml of dichloromethane, under an inert atmosphere of argon at a temperature in the region of 0° C. The mixture is stirred to a temperature in the region of 20° C. over about 2 hours. The reaction medium is taken up in 100 ml of dichloromethane and then washed with 100 ml of water. The organic phase is dried over magnesium sulfate, filtered and then concentrated to dryness under reduced pressure. The residue thus obtained is purified by flash chromatography using a cartridge 37 mm in diameter packed with 50 g of 20-40 μm conditioned silica, and then eluted with a mixture (cyclohexane/ethyl acetate) (9/1) (v/v), at a flow rate of 8 ml/minute. The fractions between 135 and 200 ml are concentrated under reduced pressure. 0.349 g of 2,6-dibromo-4-(bromomethyl)pyridine is thus obtained.

Provenance & Evidence