Cryptands and bismacrocycles with cyanuric and isocyanuric units: synthesis and structural investigations
作者:Flavia Pop、Crina Socaci、Anamaria Terec、Eric Condamine、Richard Attila Varga、Ciprian I. Raţ、Jean Roncali、Ion Grosu
DOI:10.1016/j.tet.2012.07.100
日期:2012.10
Hay synthesis of cryptands and bismacrocycles starting from tripodands with cyanuric and isocyanuric cores is reported. The structure of the compounds is revealed by X-ray diffraction, NMR spectrometry and MS investigations. DNMR experiments carried out with bismacrocycles indicated the flipping of the rings and the free-energy barrier for the conformational process could be determined in one case. (C) 2012 Elsevier Ltd. All rights reserved.
Synthesis of Podands with Cyanurate or Isocyanurate Cores and Terminal Triple Bonds
The synthesis of podands with cyanuric or isocyanuric acid cores and oligoethyleneoxy pendant arms exhibiting terminal triple bonds or brominated triple bonds is reported. The starting material for cyanuric acid derived podands is commercially available cyanuric acid, while the isocyanuric derivatives are obtained by thermal isomerization of the corresponding cyanurates.