Synthesis and transport studies of a new class of cage-annulated chiral macrocycles
作者:Thavendran Govender、Humcha K. Hariprakasha、Hendrik G. Kruger、Alan P. Marchand
DOI:10.1016/s0957-4166(03)00272-6
日期:2003.6
The synthesis of a newclass of chiral pentacycloundecane cage annulated macrocycles is reported. The ability of the chiral hosts to transport racemic phenylglycine methyl ester enantioselectively through a chloroform membrane in a U-tube was compared to that of related pyridine macrocycles. The cage annulated macrocycles showed weak to moderate enantioselectivity and very high rates of transport compared
Two new chromogenic compounds, 5 and 6, and a novel chiral chromogenic calix[4](azoxa)crown-7 8 have been synthesized using a calix[4]arene platform. The starting reagents chiral diamine e and calix[4]arene diacid chloride derivative 7 were prepared conveniently according to recent approaches. The H-1 and C-13 NMR, data showed that these compounds exist in a cone conformation. Compounds 5 and 8 have shown broad absorption bands in UV-vis spectra suggesting their utility in different fields, for example, as sensors for ions as well as for chiral molecules. (C) 2004 Elsevier Ltd. All rights reserved.
Chadwick, Derek J.; Cliffe, Ian A.; Sutherland, Ian O., Journal of the Chemical Society. Perkin transactions I, 1984, # 8, p. 1707 - 1717
作者:Chadwick, Derek J.、Cliffe, Ian A.、Sutherland, Ian O.、Newton, Roger F.
DOI:——
日期:——
Chiral diaza-18-crown-6 derivatives
作者:Derek J. Chadwick、Ian A. Cliffe、Ian O. Sutherland、Roger F. Newton
DOI:10.1039/c39810000992
日期:——
The chiral diaza-18-crown-6 derivatives (7) and (8), which are readily synthesised from the corresponding optically active α-amino-acids or derived amino-alcohols (1), form complexes with primary alkyl-ammonium salts in non-polar solvents; enantiomer recognition in complex formation depends upon the substituents R3 on the ring nitrogen atoms.