1,2-Bridged Calix[4]arene Monocrowns and Biscrowns in the 1,2-Alternate Conformation †
✍ Scribed by Ferguson, George; Lough, Alan J.; Notti, Anna; Pappalardo, Sebastiano; Parisi, Melchiorre F.; Petringa, Ada
- Book ID
- 126277629
- Publisher
- American Chemical Society
- Year
- 1998
- Tongue
- English
- Weight
- 127 KB
- Volume
- 63
- Category
- Article
- ISSN
- 0022-3263
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📜 SIMILAR VOLUMES
New methods to obtain 1,2-bridged calix[4]arene-biscrowns in the 1,2-alternate conformation are described. The stereochemistry of the proximal double functionalization reaction is mainly governed by the solvent, the length of the polyether units and the base used to deprotonate the calix[4]arene.
Water-soluble 1,2;3,4-calix[4]arene-biscrowns ( 14)-( 18) have been synthesized in two or three steps via chlorosulfonation. Cs + -ligand interactions were studied in aqueous media by 1 H NMR.