derivatives. A tetra-urea calix[4]arene of the AABB type, where A stands for a bisalkenyl- and B for a monoalkenyl-substituted urea unit, was used as precursor for the three loops. It was easily synthesised from a tetraamino calix[4]arene in which two adjacent amino groups were Boc-protected. The ABCB-type precursor for the two adjacent loops was prepared through protection of two opposite amino functions with
使用四
甲苯脲杯[4]
芳烃作为模板,通过分子内烯烃复分解,被四个单或双烯基残基取代的四
脲杯[4]
芳烃已转化为双环或四环化合物。现在已使用相同的策略来合成具有相邻环的
三环化合物和
双环化合物,从而完成了一系列含环的四
脲衍
生物。使用
AABB型的四
脲杯[4]
芳烃,其中A代表双烯基-,B代表单烯基取代的
脲单元,被用作三个环的前体。它很容易从四
氨基杯[4]
芳烃中合成,其中两个相邻的
氨基被Boc保护。通过用三苯甲基保护两个相对的
氨基官能团,制备了两个相邻环的ABCB型前体。