作者:Peter R. Edwards、Jennifer R. Hiscock、Philip A. Gale
DOI:10.1016/j.tetlet.2009.06.058
日期:2009.8
urea-based anion receptors and alkylcarbamate species formed by the reaction of carbon dioxide with primary amines have been investigated by 1H NMR. Significant downfield shifts in the NH proton signals of the receptors in the presence of the alkylcarbamates were observed, consistent with classical host:anion hydrogen-bonding. This observation demonstrates that neutral hydrogen bond donor receptors can compete
通过1 H NMR研究了一系列基于脲的阴离子受体与二氧化碳与伯胺反应形成的烷基氨基甲酸酯的相互作用。观察到在烷基氨基甲酸酯的存在下,受体的NH质子信号发生明显的下移,这与经典的主体:阴离子氢键一致。该观察表明,中性氢键供体受体可与铵阳离子竞争以结合DMSO- d 6溶液中的氨基甲酸酯。