78502-20-2Relevant academic research and scientific papers
Synthesis and Ligand Properties of the 2,3,11,12-Tetraphenylcrown-6 Diastereomers
Merz, Andreas,Eichner, Manfred,Tomahogh, Robert
, p. 1774 - 1784 (2007/10/02)
The synthesis and the assignment of the complete set of diastereomers 2a-e of 2,3,11,12-tetraphenylcrown-6 are described.The trans-anti-trans isomer 2d is identified by chiral interaction of optically active 1-phenylethylammonium hydrobromides with the racemic crown ether shown by NMR spectroscopy.Complex association constants of the new crown ethers with sodium, potassium, and ammonium picrates are discussed in terms of the geometry of the diastereomers.
CROWN ETHERS CONTAINING TRANS DOUBLE BONDS
Merz, Andreas,Eichner, Manfred,Tomahogh, Robert
, p. 1319 - 1322 (2007/10/02)
The synthesis and spectroscopic properties of 18-crown-6-derivatives containing the E-α,β-dialkoxystilbene moiety as a ring member are described.These crown ethers are chiral but their complexing ability is drastically reduced as compared with the corresponding Z-isomers.
