Synthesis and evaluation of deep cavity imidazolyl calix[n]arenes
作者:H. M. Chawla、S. Kumar、N. Pant、A. Santra、K. Sriniwas、N. Kumar、David StC. Black
DOI:10.1007/s10847-010-9921-2
日期:2011.10
A series of deep cavity diphenyl imidazolyl calix[n]arenes (4, 6, 8) have been obtained from readily available starting materials through a five step synthetic methodology involving appropriate alkylation of lower rim of preformed calixarene, formylation of the upper rim and subsequent condensation with aryl diketones in the presence of ammonium acetate and glacial acetic acid. Optimized reaction conditions for obtaining the titled derivatives in their cone configuration and their characterization by spectroscopic methods (IR, UV, NMR and FAB mass) have been delineated. The synthesized imidazolyl calixarenes have preliminarily been examined for selective recognition of monovalent metal ions (Li+, Na+, K+, Cs+, Ag+).
通过五步合成法(包括预成型钙[n]烯下缘的适当烷基化、上缘的甲酰化以及随后在醋酸铵和冰醋酸存在下与芳基二酮的缩合),从容易获得的起始材料中获得了一系列深腔二苯基咪唑钙[n]烯(4、6、8)。已对获得锥形构型的标题衍生物的优化反应条件以及通过光谱方法(红外光谱、紫外光谱、核磁共振和 FAB 质量)对其进行表征进行了界定。初步研究了合成的咪唑烷基萼片烯对一价金属离子(Li+、Na+、K+、Cs+、Ag+)的选择性识别能力。