Bis(alkylguanidinium) receptors for phosphodiesters: effect of counterions, solvent mixtures, and cavity flexibility on complexation
作者:Diane M. Kneeland、Katsuhiko Ariga、Vincent M. Lynch、Chia Yu Huang、Eric V. Anslyn
DOI:10.1021/ja00075a021
日期:1993.11
Four bis(guanidinium) receptors have been synthesized in which the guanidinium groups are spatially preorganized by an octahydroacridine (meso-3 and d,l-3) or hexahydrodicyclopenta[b,e]pyridine (meso-4 and d,l-4) spacer to complement a phosphodiester. These structures are designed to mimic the active site of staphylococcal nuclease and, thereby, form four hydrogen bonds to a bound phosphodiester with
已经合成了四种双(胍)受体,其中胍基团在空间上由八氢吖啶(meso-3 和 d,l-3)或六氢二环戊二烯 [b,e] 吡啶(meso-4 和 d,l-4)预先组织间隔以补充磷酸二酯。这些结构旨在模拟葡萄球菌核酸酶的活性位点,从而与结合的磷酸二酯形成四个氢键,而宿主结构几乎没有重组。合成包括两部分:间隔基的构建和通过胺和硫脲盐之间的分子内环化形成氨基咪唑啉基团