M. Bem, M. Cǎproiu, Marilena Vasilesco
Jun 1, 2004
Citations
0
Influential Citations
3
Citations
Journal
ChemInform
Abstract
Starting from 1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (Kryptofix K22, 1) and halogeno derivatives: 4-chloro-7-nitrobenzofurazan (2), 2- respectively 3-bromoacetylphenoxathiin (3, 4) the corresponding compounds 4N,13N-bis(7'-nitro-2',1',3'-benzoxadiazole)-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (5), 4N,13N-bis(2'-a-phenoxathiinacetylcarbonyloxy)-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (6) and 4N,13N-bis(3'-α-phenoxathiinacetylcarbonyloxy)-1,7,10,16-tetraoxa-4,13-diazacyclooctadecane (7) were synthesized. The structures of the new compounds 5, 6, 7 were confirmed by 1 H-and 1 3 C-NMR. VIS and fluorescence spectra were performed for the newly obtained products 5, 6, 7. The hydrophobicity of these compounds was determined by RPTLC showing a decrease in the following order: 6 = 7 > 5. All the compounds give red color with the Dragendorff reagent and only 6, 7 give blue-violet color in the presence of concentrated sulfuric acid.