A one pot synthetic approach to amino acid based chiral dendrimers was shown to give good yields for dendrimers with peptide linkages. Using this synthetic strategy, modification of the peripheral functionality is possible, as is the substitution of other amino acids to give mixed amino acid based dendrimers. Immobilization of our dendrimers was accomplished using a coupling method involving the carboxy derivatised dendrimers with an aminopropyl
modified silica. The use of 2-ethoxy-1-ethoxy-1,2-dihydroquinoline in a one pot protocol gave enhanced reaction conditions from which silicas bearing very high levels of dendrimer were obtained. Solid state NMR analysis substantiated that the dendrimers were bound to the silica and that they appeared to be structurally intact. These
immobilised chiral dendrimers constitute a new class of chiral stationary phases for use in HPLC.
对
氨基酸手性树枝状聚合物的一锅合成方法表明,具有肽链的树枝状聚合物产量很高。利用这种合成策略,可以改变外围功能,也可以取代其他
氨基酸,得到混合
氨基酸树枝状聚合物。我们的树枝状聚合物是通过羧基衍生树枝状聚合物与
氨基丙基改性
二氧化硅的偶联方法实现固定化的。在一锅程序中使用 2-乙氧基-1-乙氧基-1,2-二氢
喹啉可改善反应条件,从而获得含有大量树枝状聚合物的
二氧化硅。固态核磁共振分析证实,树枝状聚合物与
二氧化硅结合在一起,而且看起来结构完整。这些固定的手性树枝状聚合物构成了用于高效
液相色谱的新型手性固定相。