Metal-free synthesis of azacalix[4]arenes
β Scribed by Mounia Touil; Mohammed Lachkar; Olivier Siri
- Book ID
- 104095904
- Publisher
- Elsevier Science
- Year
- 2008
- Tongue
- French
- Weight
- 261 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0040-4039
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π SIMILAR VOLUMES
Azacalix [4]arene betaine, which possesses intramolecular positive and negative charges, was synthesized. N,N'-Dimethylazacalix[4]arene was prepared by a simple procedure and subsequent N-quaternarization afforded the N,N,N',N'-tetramethyl diammonium compound. It was converted into the betaine struc
## Abstract We describe the synthesis and spectrophotometric studies of novel N(H)βazacalix[4]arenes. The unprecedented direct functionalization of the N(H) bridges furnished N(__R__)βbridged aza[1~4~]calixarene **11** that could complex a neutral guest (CH~2~Cl~2~) or could be further reduced into
Addition of cyanuric chloride 2 (2,4,6-trichlorotriazine) to 4,6-diaminobenzene-1,3-disulfonic acid 1 gives a bis-triazine 3 which may be cyclised with diaminoarenes to yield water-soluble azacalix[4]arenes 5a-d. Alternatively, double substitution of chloride from the bis-triazine 3 yields new bis-t