The present invention relates to a method of production of a hydrazide modified sugar comprising a step of reacting a sugar with a hydrazide in a reaction solvent at a pH of between 3 and 5.5, wherein the solvent comprises an aqueous based solvent and an optional polar organic co-solvent. A further aspect of the invention relates to a method of production of a polysaccharide epitope carrier protein conjugate comprising the steps of: (a) reacting a polysaccharide epitope with a hydrazide to form a hydrazide modified polysaccharide epitope; (b) reacting the hydrazide modified polysaccharide epitope with a linker that has been pre-coupled to a carrier protein. Another aspect of the invention relates to a method of production of a sugar-dihydrazide-aldehyde adduct comprising the steps of: (a) producing a hydrazide modified sugar using a method according to the invention, wherein the hydrazide modified sugar includes a further unreacted hydrazide moiety; and (b) reacting the further hydrazide moiety with the aldehyde functionality of a linker group.
本发明涉及一种生产含有
肼改性糖的方法,包括在反应溶剂中将糖与
肼在pH值在3至5.5之间反应的步骤,其中溶剂包括
水基溶剂和可选的极性有机共溶剂。该发明的另一个方面涉及一种生产
多糖表位载体蛋白共轭物的方法,包括以下步骤:(a)将
多糖表位与
肼反应,形成
肼改性
多糖表位;(b)将
肼改性
多糖表位与预先偶联到载体蛋白上的连接剂反应。该发明的另一个方面涉及一种生产糖-二
肼-醛加合物的方法,包括以下步骤:(a)使用根据本发明的方法生产
肼改性糖,其中
肼改性糖包括进一步未反应的
肼基团;(b)将进一步的
肼基团与连接剂基团的醛功能基团反应。