Amino acids and peptides were coupled to the four aminomethyl groups of the bridged resorc[4]arene 2, resulting in peptide cavitands 3 of the general structure 2 [−Aa1-[Aa2-[Aa3]]−N(H)R]4. These compounds contain either four amino acids (3a−3d: Aa1 = Gly, Val, Leu or Phe, R = H; 3e, 3f: Aa1 = Gly or Val, R = Z), four dipeptides (3g−3l: Aa1 = Gly, Aa2 = Gly, Val, Leu, Phe, Lys(Boc) or Pro, R = Z), four
氨基酸和肽与桥接的
间苯二酚 [4]
芳烃 2 的四个
氨基甲基偶联,产生通式结构 2 [-Aa1-[Aa2-[Aa3]]-N(H)R]4 的肽空腔 3 . 这些化合物包含四种
氨基酸(3a-3d:Aa1 = Gly、Val、Leu 或 Phe,R = H;3e、3f:Aa1 = Gly 或 Val,R = Z)、四种二肽(3g-3l:Aa1 = Gly、Aa2 = Gly、Val、Leu、Phe、Lys(Boc) 或 Pro,R = Z)、四种三肽(3m、3n:Aa1 = Gly、Aa2 = Val、Aa3 = Val 或 Met,R = Z)或四种 β-Ala 二肽(3o,3p:Aa1 = β-Ala,Aa2 = Val 或 Leu,R = Z)。二肽和三肽空腔 3g-3n 具有与
间苯二酚核键合的甘
氨酸,在
氯仿溶液中与
乙腈形成稳定的包合物。络合自由能超过-5.9 kcal mol-1。在 NMR