The present invention relates to the preparation of a synthetic tetrasaccharide representing part of the repeating unit of the Streptococcus pneumoniae type 3 capsular polysaccharide as well as conjugates thereof. Said conjugates are particularly useful for prevention and/or treatment of diseases associated with Streptococcus pneumoniae, and more specifically of diseases associated with Streptococcus pneumoniae type 3. The disclosed synthetic method has the huge advantages over the state of the art synthetic methods that intermediate products are crystalline, coupling reaction yields are higher, less reaction steps are required and purification of intermediate products is easier.
本发明涉及代表肺炎链球菌 3 型荚膜
多糖部分重复单元的合成四糖及其共轭物的制备。所述共轭物特别适用于预防和/或治疗与肺炎链球菌有关的疾病,更具体地说是与 3 型肺炎链球菌有关的疾病。与现有合成方法相比,本发明公开的合成方法具有中间产物为结晶、偶联反应产率更高、所需反应步骤更少以及中间产物更易于纯化等巨大优势。