Abstract
Spirobenzopyrans and spironaphthoxazins possessing a monoaza-crown ring were synthesized. Isomerization of these compounds to the open colored merocyanines was induced by recognition of alkali-meted cations and the selectivity of the coloration was found to be governed by severed factors: (1) the size of the crown ring, (2) the position of recognition, (3) electric properties of both the complexed cations and the merocyemine dipoles, emd (4) the length of the alkyl chains connecting the spirobenzopyran units emd the crown units. The spirobenzopyrans represent rationally designed multifunctional artificial receptors for alkali-metal cations.
Original language | English |
---|---|
Pages (from-to) | 5377-5383 |
Number of pages | 7 |
Journal | Journal of Organic Chemistry |
Volume | 57 |
Issue number | 20 |
DOIs | |
State | Published - 1992/09/01 |
ASJC Scopus subject areas
- Organic Chemistry