Hydrogen Bromide → (2S,3R,4S,5S)-2-bromotetrahydro-2H-thiopyran-3,4,5-triyl triacetate

Beteiligte Stoffe

Reaktionsschritte

3.50 ml of a 30% solution of hydrobromic acid in glacial acetic acid are added at 10° C. to a solution of 2.10 g (6.3.10-3 mol) of 1,2,3,4-tetra-O-acetyl-5-thio-D-xylopyranose in 10 cm3 of dichloroethane. After 2 to 3 h, the reaction medium is hydrolyzed, washed with a solution of sodium bicarbonate and dried over sodium sulfate (Na2SO4) and the solvent is evaporated off to dryness under reduced pressure. 0.87 g (yield: 39%) of the expected product is obtained after precipitation in ether.

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