Crystal structure of inclusion complex of 5, 17-di-t-butyl-26, 28-disubstituted calix[4]arene 3 with acetone, [(C54H58N2O6 . CH3COCH3) . 2CH(3)COCH(3)], was determined by X-ray crystallographic analysis. It possesses space group C2/c, with a = 26.277(8), b = 12.967(5), c = 20.355(4) Angstrom, beta = 124.845(14)degrees, and D-calc = 1.173 mg/m(3) for Z = 4. Crystal data indicate that action of one molecule of compound 3 upon three molecules of acetone forms a clathrate intermolecular inclusion complex.
Choline Esterase Inhibitors and Synthetic Oxalic Acid Receptors Based on Calix[4]arene Derivatives
作者:I. I. Stoikov、A. A. Khrustalev、D. Sh. Ibragimova、E. E. Stoikova、G. A. Evtyugin、I. S. Antipin、A. I. Konovalov
DOI:10.1007/s11176-005-0213-2
日期:2005.2
New reversible butyrylcholine esterase inhibitors based on calix[4]arene derivatives were suggested. A series of new distally disubstituted calix[4]arenes were prepared in 60–80% yields. Some of these compounds showed properties of reversible choline esterase effectors, activating it at low concentrations and inhibiting at high concentrations. The macrocycles prepared were tested in extraction of d,l-tartaric, glycolic, d,l-mandelic, d,l-glutamic, malonic, oxalic, and succinic acids and of sodium acetate. Oxalic acid is efficiently transferred through a liquid impregnated membrane under the action of calix[4]arenes with nitrogen-containing substituents.