54533-73-2Relevant academic research and scientific papers
Chromogenic and fluorogenic crown ether compounds for the selective extraction and determination of Hg(II)
Vaidya, Bikas,Zak, Jerzy,Bastiaans, Glenn J.,Porter, Marc D.,Hallman, Johnny L.,Nabulsi, Nabeel A. R.,Utterback, Marty D.,Strzelbicka, Bozena,Bartsch, Richard A.
, p. 4101 - 4111 (2007/10/02)
Two novel crown ether compounds, N,N′-bis(2-hydroxy-5-nitrobenzyl)-4,13-diazadibenzo-18-crown-6 (CCE) and N,N′-bis(7-hydroxy-4-methylcoumarin-8-methylene)-4,13-diazadibenzo-18- crown-6 (FCE), have been synthesized as potential reagents for the selective e
Aza Crown Ethers. 13C and 1H NMR Studies of Ring Conformations and Stereochemically Dependent Shifts in N-Substituted Dibenzodiaza-18-crown-6 Ethers and a Nine-Membered Analog
Buchanan, G. W.,Landry, D. J.
, p. 127 - 132 (2007/10/02)
Remarkably large (>10 ppm) 13C NMR chemical shift differences are observed in solution and in the solid phase between ortho aromatic carbons of structurally dibenzodiaza-18-crown-6 ethers and their 9-membered ring counterparts.On the basis of geometries deduced from 1H1H NOESY results, the upfield 13C chemical shifts in the 18-membered systems are attributed to cis coplanar interactions between the terminal carbons of these torsional networks.Overall mobilities of 9- and 18-membered ring systems are examined via 13C spin-lattice relaxation times.
Efficient Synthesis of N,N'-Dimethyl Diazacoronands
Ostaszewski, Ryszard,Jacobsson, Ulla,Jurczak, Janusz
, p. 221 - 228 (2007/10/02)
Modification of the Richman and Atkins method for preparation of symmetric and nonsymmetric bis-(p-toluenesulphonyl) diazacoronands is reported.The one-pot transformation of these compounds into N,N'-dimethyl diazacoronands is also described.
