Heterocycles p. 1635 - 1639 (2001)
Update date:2022-08-05
Topics:
Inokuma, Seiichi
Funaki, Takashi
Tanakajima, Masayuki
Nabekura, Shinji
Isawa, Keigo
Nishimura, Jun
Novel thiacrownophanes (1) (cis-form) and (2) (trans-form) were prepared by means of intramolecular [2 + 2] photocycloaddition of styrene derivatives. The ratio of 1:2 was significantly dependent on the oxyethylene chain length of the linkage between the two aromatic nuclei of precursors. In a liquid-liquid extraction, thiacrownophanes (1c) possessing three ethereal oxygens showed perfect selectivity with high efficiency toward Ag+ ion. From ESI-MS analysis, 1c was found to form a 1:1 complex with Ag+ ion in MeCN-H2O homogeneous system.
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