A process for the preparation of a chlorodeoxy derivative of a reducing aldose having a primary hydroxy group in an exocyclic -CH.sub.2 OH group, in which the said primary hydroxy group is replaced by a chlorine atom to give a chlorodeoxy reducing sugar with a free anomeric center, characterized 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
氯代脱氧还原醛糖衍
生物的方法,所述还原醛糖具有一个外环-CH.sub.2 OH基团中的主要羟基,其中所述主要羟基被
氯原子取代,从而得到一个具有自由類異構中心的
氯代脱氧还原糖,其特征在于自由还原糖与一种包含N,N-二烷基(甲
亚胺)
氯化物的试剂反应,所述试剂是通过将N,N-二烷基甲酰胺与
氯化剂反应而得到的。