A process for the production of polysaccharide (20) from disaccharide (10) and saccharide (21), wherein R
1
to R
10
are each independently the same or different protecting groups; R is an optionally substituted aryl group or an optionally substituted saturated or unsaturated alkyl group; X is selected from the group consisting of hydrogen, alkyl and amino; Y is selected from the group consisting of a protecting group and one or more saccharide residues; and n is a positive integer; and further wherein said process comprises removal of the R
7
protecting group and reaction of the deprotected C4-oxygen atom of compound (21) with the C1-carbon atom of the 1-ido moiety of compound (10).
从二糖(10)和糖(21)中生产
多糖(20)的工艺,其中R1至R10分别是相同或不同的保护基;R是可选的取代芳基或可选的饱和或不饱和烷基;X选自氢,烷基和
氨基等组;Y选自保护基和一个或多个糖基残基;n是正整数;并且进一步包括去除R7保护基和使化合物(21)的去保护的C4氧原子与化合物(10)的1-
碘基团的C1碳原子反应的步骤。