Synthesis and Conformational Properties of 2-Carboxy-15-crown-5 and Its Cation Complexes
作者:Toshio Takahashi、Jesus Mallen、Dalia Lorenzo、Raj K. Khanna、Masanori Nishikawa、George W. Gokel
DOI:10.1246/bcsj.63.383
日期:1990.2
native conformation has been assessed by using infrared, NMR, and both MM2′ and MNDO calculations. Neutral cation complexes (of the form crown-COOH.MX) of this macrocycle with NaCl, NaBr, NaI, KCl, and CaCl2 have been prepared and studied. It is concluded that the carbonyl oxygen atom is a donor for the ring bound cation, an observation supported by the calculated lowest energy conformation of the
2-Carboxy-15-crown-5 已通过高锰酸钾氧化以中等产率制备。其天然构象已通过使用红外、核磁共振以及 MM2' 和 MNDO 计算进行评估。已经制备并研究了该大环与 NaCl、NaBr、NaI、KCl 和 CaCl2 的中性阳离子络合物(形式为冠-COOH.MX)。得出的结论是羰基氧原子是环结合阳离子的供体,这一观察结果得到了计算出的非络合大环的最低能量构象的支持。