1010705-96-0Relevant articles and documents
Di-ionizable calix[4]arene-1,2-crown-5 and -crown-6 ethers in cone conformations: synthesis and divalent metal ion extraction
Tu, Chuqiao,Surowiec, Kazimierz,Gega, Jerzy,Purkiss, David W.,Bartsch, Richard A.
, p. 1187 - 1196 (2008)
Two series of di-ionizable calix[4]arene-1,2-crown-5 and -crown-6 ethers in cone conformations are synthesized. The ionizable groups are oxyacetic acid moieties and N-(X)sulfonyl oxyacetamide units with X=methyl, phenyl, 4-nitrophenyl, and trifluoromethyl