Water-soluble cationic cyclophane 1 having four ester side chains with terminal choline residues was synthesized as a pH-responsive degradable host. Alkaline hydrolysis of the ester bonds of 1 gave the corresponding tetraanionic cyclophane 2, which exhibited guest-binding affinities that led to release of the entrapped anionic guest molecules into the bulk aqueous phase.
合成了
水溶性阳离子环
芳烃1,其具有四个带有末端
胆碱残基的酯侧链,作为pH响应型可降解宿主。对1的酯键进行碱性
水解得到相应的四负离子环
芳烃2,该化合物表现出客体结合亲和力,从而使被捕获的阴离子客体分子释放到大量
水相中。