A practical and convenient method for the preparation of α-, β-, and γ-cyclodextrin derivatives, in which the secondary hydroxyl faces of A- and C-glucose units are regioselectively modified, has been developed. Reactions of α-, β-, and γ-cyclodextrins with 1,4-dibenzoylbenzene-3′,3″-disulfonyl imidazole in N,N-dimethylformamide in the presence of molecular sieves regioselectively afforded the corresponding
已经开发了一种实用且方便的制备α-,β-和γ-
环糊精衍
生物的方法,其中对A-和C-
葡萄糖单元的仲羟基面进行了区域选择性修饰。α-,β-的反应,并用1,4-二苯甲酰基苯-3',3“-disulfonyl
咪唑在γ
环糊精Ñ,Ñ二甲基甲酰胺在
分子筛的存在区域选择性得到相应的环状2甲,2 Ç - (1,4-二苯甲酰基苯-3',3″-二磺酰基)-
环糊精。随后用
氢氧化钠或
氨水处理磺酰化的
环糊精,得到相应的2 A,3 A:2 C,3 C-di-manno-epoxy-cyclodextrins或3 A,3 C -diamino-3 A,3 C -dideoxy-(2 A S,2 C S,3 A S,3 C S)-
环糊精作为
环糊精进一步功能化的重要中间体。