A process for the preparation of a chlorodeoxy derivative of a reducing aldose having a primary hydroxy group in an exocyclic -CH20H group, in which the said primary hydroxy group is replaced by a chlorine atom to give a chlorodeoxy reducing sugar with a free anomeric centre, characterised in that the free reducing sugar is reacted with a reagent comprising an N,N-dialkyl (methaniminium) chloride obtained by reacting an N,N-dialkyl formamide with a chlorinating agent.
一种用于制备外环-CH20H基团中具有伯羟基的还原性醛糖的
氯脱氧衍
生物的工艺,其中所述伯羟基被一个
氯原子取代,从而得到具有游离异构中心的
氯脱氧还原糖,其特征在于游离还原糖与一种试剂反应,该试剂包括通过使N,N-二烷基甲酰胺与
氯化剂反应而得到的N,N-二烷基(甲
亚胺)
氯化物。