Synthesis of Tripodal and Hexapodal Pyrazole- and Benzimidazole-Bearing Compounds
作者:Monika Mazik、Niklas Koch
DOI:10.1055/s-0033-1338518
日期:——
The syntheses of eight new tripodal and hexapodal benzimidazole- and pyrazole-bearing compounds, which are all potentially applicable for use as artificial receptors, are described. The prepared compounds contain either bromo-substituted heteroaromatic rings, able to participate in halogen-bonding interactions, or their analogues lacking the bromo substituents. Furthermore, the preparation of a new trisbenzimidazolium cage is included in this work. All used practical synthetic procedures are facilely accomplishable and provide the products in good to excellent yields. In addition, slightly modified, simplified synthetic procedures for five known tripodal compounds, which lead to better yields than those previously reported, are also detailed.
Seven-Membered Intramolecular Hydrogen Bonding of Phenols: Database Analysis and Phloroglucinol Model Compounds
作者:Ronald K. Castellano、Yan Li、Edwin A. Homan、Andrew J. Lampkins、Iris V. Marín、Khalil A. Abboud
DOI:10.1002/ejoc.201200438
日期:2012.8
intramolecular hydrogenbonding (7MHB) arrangements involving phenolic hydroxyl group donors have been investigated through Cambridge Structural Database (CSD) and literature mining, and by the characterization of model compounds. The CSD reveals the numerous H-bond accepting functional groups that can participate in 7MHB when they are proximal to a phenolic OH, including alcohols, amides, amines, ethers, N-containing