2089-87-4Relevant academic research and scientific papers
Molecular Recognition of Naphthalenedicarboxylic Acid Regioisomers by Cyclodextrins
Tan, Wei Hua,Niino, Noriaki,Ishikura, Takahiro,Maruta, Aya,Yamamoto, Tatsuyuki,Matsui, Yoshihisa
, p. 1285 - 1292 (1998)
Complexation of cyclodextrins (CD's) with some regioisomers of naphthalenedicarboxylic acid (NDC) was examined in 0.1 mol dm-3 NaHCO3 at 25°C by means of 1H NMR spectroscopy, together with the measurement of induced circular dichroism spectra of NDC's with the addition of CD's. The 1H NMR spectra of 2,6- and 2,7-NDC's showed characteristic AB-type patterns, which changed continuously with increasing CD concentration in accord with the Pople theory. The binding constants (Ka) for β-CD complexes with NDC's increased in the order of: 1,4-NDC ≈ 1,5-NDC a values.
The Zinc(II)-Catalyzed Henkel Reaction of Dipotassium 1,8-Naphthalenedicarboxylate in a Dispersion Medium
Fujishiro, Koichi,Mitamura, Shuichi
, p. 786 - 790 (2007/10/02)
The Henkel reaction of dipotassium 1,8-naphthalenedicarboxylate in naphthalene as a dispersion medium gave dipotassium 2,6-naphthalenedicarboxylate (1) in a higher yield and with a better reproducibility than the reaction without a dispersion medium.Catalysts, particularly zinc catalysts, were examined in detail.The anion moiety of zinc catalysts affected the reaction, and the halide anion was effective for the selective formation of 1.The addition of potassium halide to the zinc catalysts also increased the yield of 1.The catalytic activity of the halide anion increased in the order: Cl---.The activity of the zinc catalysts was also compared with that of cadmium catalysts.
