reactions (CuAAC). The reducing end is activated as a glycosyl azide and masked as a 1,6-anhydro sugar, while the nonreducing end is activated as a free alkyne and masked as a triethylsilyl-alkyne. Following a cyclooligomerization approach, the first examples of close analogues of cyclodextrins composed of d-glucose residues and triazole units bound together through α-(1,4) linkages were obtained. The
已经开发出一种模块化策略,以获取设计成用于多价
配体合成的预功能化支架的多种环状和无环寡
糖类似物。这种收敛方法基于具有两个暂时屏蔽功能的双功能糖结构单元,可以将它们正交激活以进行Cu(I)催化的
叠氮化物-
炔烃环加成反应(Cu
AAC)。还原端被活化为糖基
叠氮化物,并被掩蔽为1,6-脱
水糖,而非还原端被活化为游离炔,并被掩蔽为三乙基甲
硅烷基-炔。继环寡聚化方法之后,由d组成的
环糊精的紧密类似物的第一个例子获得了通过α-(1,4)键结合在一起的-
葡萄糖残基和三唑单元。含有四个糖单元的cycloglucopyranoside类似物被用作模板,以制备多价系统显示保护d
甘露糖衍
生物或通过Cu
AAC的方式亚
氨基糖。另一方面,模块化方法导致大小受控的无环
炔烃官能化支架被用于合成多价亚
氨基糖。