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- Title
Asymmetric calixarene derivatives as potential hosts in chiral recognition processes.
- Authors
Maftei, Catalin V.; Fodor, Elena; Jones, Peter G.; Franz, M. Heiko; Davidescu, Corneliu M.; Neda, Ion
- Abstract
New chiral derivatives of 15,35,55,75-tetra-tert-butyl-1,3,5,7(1,3)-tetrabenzenacyclooctaphane-12,32,52,72-tetraol [( 1); tert-butyl-calix[4]-arene] were synthesized by coupling modified chiral quinuclidines derived from the natural-product-based alkaloids quincorine and quincoridine with the calix[4]arene 1 via either an ester bond or an amide bond. X-ray analyses of two products were performed. Applications of the products in asymmetric catalytic hydrogen transfer reactions are described. A protocol is presented to multi-substitute calix[4]arene at the methylene bridges, resulting in, e.g., 2,6-carboxyl-all-tert-butyl all-methoxy-calix[4]arene.
- Subjects
CALIXARENE derivatives; CHIRAL recognition; CHEMICAL processes; CHEMICAL bonds; CHEMICAL synthesis
- Publication
Pure & Applied Chemistry, 2015, Vol 87, Issue 4, p415
- ISSN
0033-4545
- Publication type
Article
- DOI
10.1515/pac-2014-1121