1,3-Dipolar cycloaddition of the nitrone functionality of 13 and the alkene functionality of 8 yields the backbone-to-backbone cyclised peptides 14–16. The conformation of these structures is such that they are β-turn mimics. They differ in their stereochemistry with discrete conformational differences.
1,3-偶极环加成13的硝酮官能团和8的烯基的官能团产生从骨架到主干的环化肽14-16。这些结构的构象使得它们是β-转角模拟物。它们的立体
化学不同,构象差异也不同。