Practical and convenient modifications of the A,C-secondary hydroxyl face of cyclodextrins
作者:Katsunori Teranishi
DOI:10.1016/s0040-4020(03)00259-x
日期:2003.3
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。