repetitive alkylations at benzylic N-atoms. Cyclizations at the resins were effected conventionally by direct intramolecular SN2 reactions between sulfonyl-protected terminal amino groups and primary alkyl bromides or by intramolecular Mitsunobu reactions between sulphonamides and primary alcohols. Particularly the latter transformation proved to be powerful for the construction of medium- as well as large-sized
显示了一种基于固相
化学合成环状
多胺的方法。线性
多胺是通过在苄基N原子上的重复烷基化作用从中心逐步在固相载体上合成的。在
树脂环化物通常通过直接分子内小号实现Ñ 2个反应磺酰基-保护的末端
氨基和伯烷基
溴化物之间或由磺酰胺和伯醇之间的分子内的Mitsunobu反应。尤其是,后者的变形被证明对于构造中型和大型环非常有效。