The first examples of singly bridged calix [7]arenes 2-4 have been obtained by base-promoted direct O-alkylation of p-tert-butylcalix [7]arene with a variety of bis-electrophiles including BrCH 2 Cl, oligoethylene glycol ditosylates, and 1,4-bis(bromomethyl)benzene. 1,2-Bridging was favored with 'sh
Threefold Bridged p-tert-Butylcalix[9]arene Triphosphate
✍ Scribed by Jörg Gloede; Sigrid Ozegowski; Burkhard Costisella; C. David Gutsche
- Publisher
- John Wiley and Sons
- Year
- 2003
- Tongue
- English
- Weight
- 110 KB
- Volume
- 2003
- Category
- Article
- ISSN
- 1434-193X
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✦ Synopsis
Abstract
p‐tert‐Butylcalix[9]arene 1 reacts with phosphorus pentachloride and then with water to give the p‐tert‐butylcalix[9]arene triphosphate 5, representing the first bridged calix[9]arene derivative to be described in the literature. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003)
📜 SIMILAR VOLUMES
p-terbButylcalix arene analogs in which up to four methylene bridges were replaced by sulfur bridge(s) were synthesized. NMR studies indicated that the thiacalixarenes were conformationally much more fle~dble than the parent calixarene in CDCh solution; the flexibility was greater with increasing nu