The partial positive charge of amide protons is used to promote macrocyclization and form crown-ether analogs. Their deprotonation generates very selective pH-switchable alkaline earth ion receptors only in the presence of an appropriate substrate.
酰胺质子的部分正电荷用于促进大环化并形成
冠醚类似物。仅在适当底物存在的情况下,它们的去质子化才会产生非常选择性的 pH 可切换的碱土离子受体。