beta-Maltose → Cellobionic acid

Participants

Reaction Steps

An aldobiose such as lactose or maltose, is electrolytically oxidised in the presence of the alkali metal carbonates/bicarbonates and alkali bromides to obtain the solution of alkali metal lactobionate, maltobionate, etc. The resulting solution is concentrated under reduced pressure to a thin syrup from which the salt is precipitated by adding 95% ethyl alcohol or isopropyl alcohol. The crude salt is dissolved in a minimum amount of hot water and then filtered through decolorizing carbon and the salt recrystallized by adding a suitable amount of the desired alcohol. The process is repeated 3-4 times to get the desired alkali salt in the pure state.

Provenance & Evidence