Square pegs in round holes. Preparation and intramolecular complexation of cubyl substituted β-cyclodextrins † and of an adamantane analogue
作者:Bruce L. May、Philip Clements、John Tsanaktsidis、Christopher J. Easton、Stephen F. Lincoln
DOI:10.1039/a905390e
日期:——
The reaction of either 1-methoxycarbonyl-4-(4-nitrophenoxycarbonyl)cubane or its dimethyl analogue, 2,3-dimethyl-1-methoxycarbonyl-4-(4-nitrophenoxycarbonyl)cubane, with the primary amine of 6A-(6-aminohexyl)amino-6A-deoxy-β-cyclodextrin produces the first cubyl substituted β-cyclodextrins, 6A-deoxy-6A-6-[N-(4-methoxycarbonylcuban-1-ylcarbonyl)amino]hexylamino}-β-cyclodextrin and its dimethyl analogue, respectively, and 4-nitrophenolate. The reaction of 1,4-bis(4-nitrophenoxycarbonyl)cubane with 6A-(6-aminohexyl)amino-6A-deoxy-β-cyclodextrin produces the dimer 1,4-bis6-[N-(6A-deoxy-β-cyclodextrin-6A-yl)amino]hexylaminocarbonyl}cubane. 1H NMR ROESY studies are consistent with the cubyl moiety of each of the above three cubyl-substituted β-cyclodextrins complexing in the β-cyclodextrin annuli in D2O. The reaction of 1-(4-nitrophenoxycarbonyl)adamantane with β-cyclodextrin produces 6A-6-[N-(1-adamantylcarbonyl)amino]hexylamino}-6A-deoxy-β-cyclodextrin which shows a strong intramolecular complexation of its adamantyl moiety. Adamantane-1-carboxylate forms intermolecular complexes with the above three cubyl-substituted β-cyclodextrins in D2O solution and excludes the cubyl moiety from the β-cyclodextrin annulus. However, this does not occur for 6A-6-[N-(1-adamantylcarbonyl)amino]hexylamino}-6A-deoxy-β-cyclodextrin where intramolecular complexation appears to be sufficiently strong to prevent intermolecular complexation of adamantane-1-carboxylate.
1-甲氧羰基-4-(4-硝基苯氧羰基)立方烷或其二甲基类似物2,3-二甲基-1-甲氧羰基-4-(4-硝基苯氧羰基)立方烷与6A-(6-氨基己基)氨基-6A-脱氧-β-环糊精的一级胺反应,分别生成首例立方烷取代的β-环糊精:6A-脱氧-6A-6-[N-(4-甲氧羰基立方烷-1-基羰基)氨基]己基氨基}-β-环糊精及其二甲基类似物和4-硝基苯酚。1,4-双(4-硝基苯氧羰基)立方烷与6A-(6-氨基己基)氨基-6A-脱氧-β-环糊精反应生成二聚体1,4-双6-[N-(6A-脱氧-β-环糊精-6A-基)氨基]己基氨基羰基}立方烷。1H NMR ROESY研究表明,上述三种立方烷取代的β-环糊精中的立方烷部分在D2O中与β-环糊精环孔形成复合物。1-(4-硝基苯氧羰基)金刚烷与β-环糊精反应生成6A-6-[N-(1-金刚烷基羰基)氨基]己基氨基}-6A-脱氧-β-环糊精,显示其金刚烷部分具有强烈的分子内复合作用。金刚烷-1-羧酸酯在D2O溶液中与上述三种立方烷取代的β-环糊精形成分子间复合物,并排斥立方烷部分进入β-环糊精环孔。然而,对于6A-6-[N-(1-金刚烷基羰基)氨基]己基氨基}-6A-脱氧-β-环糊精,其分子内复合作用似乎足够强,足以防止金刚烷-1-羧酸酯的分子间复合作用。