e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Lipophilic diammonium cation having a rigid structure complementary to pyrophosphate dianions of nucleotides. Selective extraction and transport of nucleotides
I Tabushi, Y Kobuke, J Imuta
Index: Tabushi, Iwao; Kobuke, Yoshiaki; Imuta, Jun-ichi Journal of the American Chemical Society, 1981 , vol. 103, # 20 p. 6152 - 6157
Abstract: 1, 4-Diazabicyclo [2.2. 2] octane was attached symmetrically by two stearyl chains on nitrogens to afford two cationic centers 2.4 A apart from each other. Various nucleotide anions were transferred from an aqueous solution to a chloroform solution via salt formation with the ammonium cation. The number of phosphate units in nucleotides was thus recognized to give the relative order tri-> di-> monophosphate. The selectivity ratios were ...