Hydrogen Bromide → Bromide ion

Participants

Reaction Steps

To a 500 ml flask was added 50 g of glucose pentaacetate (C6H22O11) and 80 ml of methylene chloride. The mixture was stirred at ice-water bath for 20 min HBr in HOAc (33%, 50 ml) was added to the reaction mixture. After stirring for 2.5 hr another 5 ml of HBr was added to the mixture. After another 30 min, the mixture was added 600 ml of methylene chloride. The organic mixture was washed with cold water (200 ml×2), Saturated NaHCO3(200 ml×2), water (200 ml) and brine (200 ml×2). The organic layer was dried over Na2SO4 and the mixture was evaporated at RT to give white solid as final product, bromide derivative, IntD1 (˜95% yield). C14H19BrO9, TLC Rf=0.49, SiO2, 40% ethyl acetate/60% hexanes; Exact Mass 410.02.

Provenance & Evidence