333382-85-7Relevant articles and documents
NEW HETEROCYCLIC COMPOUNDS
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Page/Page column 67; 110, (2019/06/17)
The invention provides new heterocyclic compounds having the general formula (IA) wherein A, L, X, Y, m, n, R1 and R2 are as described herein, compositions including the compounds, processes of manufacturing the compounds and methods of using the compounds.
Synthesis of pyridinocrownophanes exhibiting high Ag+-affinity
Inokuma, Seiichi,Kimura, Koichi,Funaki, Takashi,Nishimura, Jun
, p. 123 - 130 (2007/10/03)
Crownophanes possessing a pyridine moiety were prepared by means of intramolecular [2 + 2] photocycloaddition of the styrene derivatives. The crown compounds having six to ten ethereal oxygens selectively extracted Ag+ with high efficiency in the liquid-liquid extraction. The high extractability and efficiency were maintained even at low pH region of the extraction system. From ESI-MS analysis, it was found that the crownophanes formed some kinds of complexes having 1:1 and 2:1 stoichiometry (host/guest) with Ag+ and Pb2+ in MeCN-H2O homogeneous system.