Cyclic octapeptides (1-4) having analogous amino acid sequences were synthesized from the corresponding linear peptides using a conventional sulution-phase method. The cyclization was performed by the EDCI/HOBt procedure using an equimolar mixture of alkaline metal cations at a high dilution (concentration of linear peptide : 1.2 mM). The selective transport of amino acid methyl ester and amine salts through an organic liquid membrane mediated by the synthetic cyclic octapeptides and the enantiomer recognition properties in the transport of racemic Phe-OMe salt were examined. The cyclic octapeptides transported D-Phe-OMe salt more efficiently than other guest salts.
采用传统的稀释法从相应的线性肽合成了具有类似
氨基酸序列的环状八肽(1-4)。环化采用 E
DCI/
HOBt 程序,使用碱
金属阳离子等摩尔混合物高稀释(线性肽浓度:1.2 mM)。研究了合成环状八肽介导的
氨基酸甲
酯和胺盐通过有机液体膜的选择性转运以及外消旋 Phe-OMe 盐转运过程中的对映体识别特性。环状八肽转运 D-Phe-Ome盐的效率高于其他客体盐。