analogues 1, 3 and 4. X-ray and NMR structure analysis have identified the differences of the six-membered ring conformations which cause the improved esterification properties of the all-cis stereoisomers. The homooligomeric all-cis δ-valerolactams 46–48 are used as polyol templates for the self-assembly of peptidic oligomers 49–52 by dynamic covalent chemistry. The templates have a diol spacing of approximately
所述6,7,8,8a-顺(清一色顺式的)取代的δ-戊内酰胺10,11和12是用于
硼酸酯的形成高亲和力的二醇,优于相应的6,7-反式类似物1,3和4。X射线和NMR结构分析已经确定了六元环构象的差异,这些差异导致了全顺式立体异构体的酯化性能得到改善。同源低聚的顺式δ-戊内酰胺46–48被用作
多肽低聚物49–52自组装的多元醇模板。通过动态共价
化学。模板具有约5的二醇间隔,适合于由目标肽,2-甲酰基苯基
硼酸和相应模板之间的定量反应组装支链肽。根据该策略,四聚体Aβ-最小淀粉样蛋白52由三组分系统中的九个单个分子自发形成。基于三聚体Aβ(32-40)-迷你淀粉样蛋白51的完整顺序分配进行的详细NMR分析确定了其在溶液中的三维结构。