Methods of synthesizing gm3

摘要

The invention describes an improved method for making monosialoganglioside GM3 and its intermediates. Following reaction of a neuraminic acid donor and a lactose acceptor in the presence of an acid catalyst, the alpha and beta isomers of GM3 are formed. The alpha isomer is converted to a lactone, via action of a ring forming basic catalyst, which is then separable from the beta isomer. The lactone is then treated with a basic catalyst in the presence of an alcohol, to form GM3 or a GM3 intermediate.